diff --git a/configure.ac b/configure.ac
index d635aa41c3..85248932ea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -457,7 +457,7 @@ AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
 AM_PROG_CC_C_O
 
 dnl Before autoconf 2.70, AC_PROG_CC_C99 is supposedly necessary for some
-dnl compilers if you wan't C99 support. Starting with 2.70, it is obsolete and
+dnl compilers if you want C99 support. Starting with 2.70, it is obsolete and
 dnl forbidden.
 m4_version_prereq([2.70], [:], [AC_PROG_CC_C99])
 
diff --git a/scripts/maint/format_changelog.py b/scripts/maint/format_changelog.py
index 93ab56e257..32b47ffcbb 100755
--- a/scripts/maint/format_changelog.py
+++ b/scripts/maint/format_changelog.py
@@ -424,7 +424,7 @@ def bug_html(m):
     try:
         disp_prefix, url_prefix = ISSUE_PREFIX_MAP[prefix]
     except KeyError:
-        print("Can't figure out URL for {}{}".formt(prefix,bugno),
+        print("Can't figure out URL for {}{}".format(prefix,bugno),
               file=sys.stderr)
         return "{} {}{}".format(kind, prefix, bugno)
 
diff --git a/src/core/or/congestion_control_common.c b/src/core/or/congestion_control_common.c
index 36099cc1c6..54de48b39d 100644
--- a/src/core/or/congestion_control_common.c
+++ b/src/core/or/congestion_control_common.c
@@ -376,7 +376,7 @@ congestion_control_new(const circuit_params_t *params, cc_path_t path)
 }
 
 /**
- * Free a congestion control object and its asssociated state.
+ * Free a congestion control object and its associated state.
  */
 void
 congestion_control_free_(congestion_control_t *cc)
diff --git a/src/core/or/congestion_control_flow.c b/src/core/or/congestion_control_flow.c
index 035337b55e..ea2c0df42c 100644
--- a/src/core/or/congestion_control_flow.c
+++ b/src/core/or/congestion_control_flow.c
@@ -235,7 +235,7 @@ circuit_send_stream_xon(edge_connection_t *stream)
  * Process a stream XOFF, parsing it, and then stopping reading on
  * the edge connection.
  *
- * Record that we have recieved an xoff, so we know not to resume
+ * Record that we have received an xoff, so we know not to resume
  * reading on this edge conn until we get an XON.
  *
  * Returns false if the XOFF did not validate; true if it does.
diff --git a/src/core/or/congestion_control_nola.c b/src/core/or/congestion_control_nola.c
index 0c64793d91..53bbf9e7b4 100644
--- a/src/core/or/congestion_control_nola.c
+++ b/src/core/or/congestion_control_nola.c
@@ -53,7 +53,7 @@ congestion_control_nola_set_params(congestion_control_t *cc)
 *
 * To handle the case where the local orconn blocks, TOR_NOLA uses
 * the 'piecewise' BDP estimate, which uses more a conservative BDP
-* estimate method when blocking occurrs, but a more aggressive BDP
+* estimate method when blocking occurs, but a more aggressive BDP
 * estimate when there is no local blocking. This minimizes local
 * client queues.
 */
diff --git a/src/core/or/congestion_control_st.h b/src/core/or/congestion_control_st.h
index 2c905772c1..bc547b59d9 100644
--- a/src/core/or/congestion_control_st.h
+++ b/src/core/or/congestion_control_st.h
@@ -19,12 +19,12 @@ typedef enum {
   CC_ALG_SENDME = 0,
 
   /**
-   * Prop#324 TOR_WESTWOOD - Deliberately agressive. Westwood may not even
+   * Prop#324 TOR_WESTWOOD - Deliberately aggressive. Westwood may not even
    * converge to fairness in some cases because max RTT will also increase
-   * on congesgtion, which boosts the Westwood RTT congestion threshhold. So it
+   * on congestion, which boosts the Westwood RTT congestion threshold. So it
    * can cause runaway queue bloat, which may or may not lead to a robot
    * uprising... Ok that's Westworld, not Westwood. Still, we need to test
-   * Vegas and NOLA against something more agressive to ensure they do not
+   * Vegas and NOLA against something more aggressive to ensure they do not
    * starve in the presence of cheaters. We also need to make sure cheaters
    * trigger the oomkiller in those cases.
    */
@@ -32,7 +32,7 @@ typedef enum {
 
   /**
    * Prop#324 TOR_VEGAS - TCP Vegas-style BDP tracker. Because Vegas backs off
-   * whenever it detects queue delay, it can be beaten out by more agressive
+   * whenever it detects queue delay, it can be beaten out by more aggressive
    * algs. However, in live network testing, it seems to do just fine against
    * current SENDMEs. It outperforms Westwood and does not stall. */
   CC_ALG_VEGAS = 2,
@@ -40,7 +40,7 @@ typedef enum {
   /**
    * Prop#324: TOR_NOLA - NOLA looks the BDP right in the eye and uses it
    * immediately as CWND. No slow start, no other congestion signals, no delay,
-   * no bullshit. Like TOR_VEGAS, it also uses agressive BDP estimates, to
+   * no bullshit. Like TOR_VEGAS, it also uses aggressive BDP estimates, to
    * avoid out-competition. It seems a bit better throughput than Vegas,
    * but its agressive BDP and rapid updates may lead to more queue latency. */
   CC_ALG_NOLA = 3,
@@ -147,7 +147,7 @@ struct congestion_control_t {
   /**
    * For steady-state: the number of sendme acks until we will acknowledge
    * a congestion event again. It starts out as the number of sendme acks
-   * in a congestion windowm and is decremented each ack. When this reaches
+   * in a congestion window and is decremented each ack. When this reaches
    * 0, it means we should examine our congestion algorithm conditions.
    * In this way, we only react to one congestion event per congestion window.
    *
@@ -193,7 +193,7 @@ struct congestion_control_t {
   bdp_alg_t bdp_alg;
 
   /** Algorithm-specific parameters. The specific struct that is used
-   * depends upon the algoritghm selected by the cc_alg parameter.
+   * depends upon the algorithm selected by the cc_alg parameter.
    * These should not be accessed anywhere other than the algorithm-specific
    * files. */
   union {
@@ -204,7 +204,7 @@ struct congestion_control_t {
 };
 
 /**
- * Returns the number of sendme acks we will recieve before we update cwnd.
+ * Returns the number of sendme acks we will receive before we update cwnd.
  *
  * Congestion control literature recommends only one update of cwnd per
  * cwnd worth of acks. However, we can also tune this to be more frequent
diff --git a/src/core/or/congestion_control_westwood.c b/src/core/or/congestion_control_westwood.c
index 2e4575554a..e57a661b85 100644
--- a/src/core/or/congestion_control_westwood.c
+++ b/src/core/or/congestion_control_westwood.c
@@ -65,10 +65,10 @@ congestion_control_westwood_set_params(congestion_control_t *cc)
 }
 
 /**
- * Return the RTT threshhold that signals congestion.
+ * Return the RTT threshold that signals congestion.
  *
  * Computed from the threshold parameter that specifies a
- * percent between the min and max RTT obseved so far.
+ * percent between the min and max RTT observed so far.
  */
 static inline uint64_t
 westwood_rtt_signal(const congestion_control_t *cc)
@@ -111,7 +111,7 @@ westwood_is_congested(const congestion_control_t *cc)
       westwood_rtt_signal(cc) - cc->min_rtt_usec < USEC_ONE_MS)
     return false;
 
-  /* If the EWMA-smoothed RTT exceeds the westwood RTT threshhold,
+  /* If the EWMA-smoothed RTT exceeds the westwood RTT threshold,
    * then it is congestion. */
   if (cc->ewma_rtt_usec > westwood_rtt_signal(cc))
     return true;
@@ -123,11 +123,11 @@ westwood_is_congested(const congestion_control_t *cc)
  * Process a SENDME and update the congestion window according to the
  * rules specified in TOR_WESTWOOD of Proposal #324.
  *
- * Essentially, this algorithm uses a threshhold of 'rtt_thresh', which
+ * Essentially, this algorithm uses a threshold of 'rtt_thresh', which
  * is a midpoint between the min and max RTT. If the RTT exceeds this
- * threshhold, then queue delay due to congestion is assumed to be present,
- * and the algirithm reduces the congestion window. If the RTT is below the
- * threshhold, the circuit is not congested (ie: queue delay is low), and we
+ * threshold, then queue delay due to congestion is assumed to be present,
+ * and the algorithm reduces the congestion window. If the RTT is below the
+ * threshold, the circuit is not congested (ie: queue delay is low), and we
  * increase the congestion window.
  *
  * The congestion window is updated only once every congestion window worth of
diff --git a/src/core/or/dos.c b/src/core/or/dos.c
index e8652c901e..2eb5782481 100644
--- a/src/core/or/dos.c
+++ b/src/core/or/dos.c
@@ -513,7 +513,7 @@ conn_update_on_connect(conn_client_stats_t *stats, const tor_addr_t *addr)
 
   /* Assess connect counter. Mark it if counter is down to 0 and we haven't
    * marked it before or it was reset. This is to avoid to re-mark it over and
-   * over again extending continously the blocked time. */
+   * over again extending continuously the blocked time. */
   if (token_bucket_ctr_get(&stats->connect_count) == 0 &&
       stats->marked_until_ts == 0) {
     conn_mark_client(stats);
diff --git a/src/core/or/edge_connection_st.h b/src/core/or/edge_connection_st.h
index dab32fc8d0..942991f139 100644
--- a/src/core/or/edge_connection_st.h
+++ b/src/core/or/edge_connection_st.h
@@ -108,7 +108,7 @@ struct edge_connection_t {
 
   /**
    * The following fields are used to count the total bytes sent on this
-   * stream, and compare them to the number of XON and XOFFs recieved, so
+   * stream, and compare them to the number of XON and XOFFs received, so
    * that clients can check rate limits of XOFF/XON to prevent dropmark
    * attacks. */
   uint32_t total_bytes_xmit;
diff --git a/src/core/or/half_edge_st.h b/src/core/or/half_edge_st.h
index ac97eb19f1..642d8e1ea5 100644
--- a/src/core/or/half_edge_st.h
+++ b/src/core/or/half_edge_st.h
@@ -32,7 +32,7 @@ typedef struct half_edge_t {
   int data_pending;
 
   /**
-   * Monotime timestamp of when the other end should have successfuly
+   * Monotime timestamp of when the other end should have successfully
    * shut down the stream and stop sending data, based on the larger
    * of circuit RTT and CBT. Used if 'used_ccontrol' is true, to expire
    * the half_edge at this monotime timestamp. */
diff --git a/src/core/or/lttng_cc.inc b/src/core/or/lttng_cc.inc
index b7bf58e196..de06fa026f 100644
--- a/src/core/or/lttng_cc.inc
+++ b/src/core/or/lttng_cc.inc
@@ -30,7 +30,7 @@
  * Flow Control
  */
 
-/* Emitted everytime the flow_control_decide_xon() function is called. */
+/* Emitted every time the flow_control_decide_xon() function is called. */
 TRACEPOINT_EVENT(tor_cc, flow_decide_xon,
   TP_ARGS(const edge_connection_t *, stream, size_t, n_written),
   TP_FIELDS(
diff --git a/src/feature/dirparse/unparseable.c b/src/feature/dirparse/unparseable.c
index 930717a6ff..e966db734a 100644
--- a/src/feature/dirparse/unparseable.c
+++ b/src/feature/dirparse/unparseable.c
@@ -403,7 +403,7 @@ dump_desc_compare_fifo_entries(const void **a_v, const void **b_v)
       }
     } else {
       /*
-       * We shouldn't see this, but what the hell, NULLs precede everythin
+       * We shouldn't see this, but what the hell, NULLs precede everything
        * else
        */
       return 1;
diff --git a/src/feature/keymgt/loadkey.c b/src/feature/keymgt/loadkey.c
index 114b7ae665..1000826376 100644
--- a/src/feature/keymgt/loadkey.c
+++ b/src/feature/keymgt/loadkey.c
@@ -712,7 +712,7 @@ ed_key_init_from_file(const char *fname, uint32_t flags,
 }
 
 /**
- * Create a new signing key and (optionally) certficiate; do not read or write
+ * Create a new signing key and (optionally) certificate; do not read or write
  * from disk.  See ed_key_init_from_file() for more information.
  */
 ed25519_keypair_t *
diff --git a/src/feature/relay/relay_config.c b/src/feature/relay/relay_config.c
index 959128a298..85ccfc18a7 100644
--- a/src/feature/relay/relay_config.c
+++ b/src/feature/relay/relay_config.c
@@ -190,7 +190,7 @@ describe_relay_port(const port_cfg_t *port)
 
 /** Return true iff port p1 is equal to p2.
  *
- * This does a field by field comparaison. */
+ * This does a field by field comparison. */
 static bool
 port_cfg_eq(const port_cfg_t *p1, const port_cfg_t *p2)
 {
diff --git a/src/lib/metrics/metrics_store.c b/src/lib/metrics/metrics_store.c
index 33b1780438..b017e97688 100644
--- a/src/lib/metrics/metrics_store.c
+++ b/src/lib/metrics/metrics_store.c
@@ -60,7 +60,7 @@ get_output(const metrics_store_t *store, buf_t *data, fmt_driver_fn_t fmt)
   tor_assert(fmt);
 
   STRMAP_FOREACH(store->entries, key, const smartlist_t *, entries) {
-    /* Indicate that we've formatted the coment already for the entries. */
+    /* Indicate that we've formatted the comment already for the entries. */
     bool comment_formatted = false;
     SMARTLIST_FOREACH_BEGIN(entries, const metrics_store_entry_t *, entry) {
       fmt(entry, data, comment_formatted);
diff --git a/src/lib/thread/compat_winthreads.c b/src/lib/thread/compat_winthreads.c
index e25fb52e39..f28cdcca00 100644
--- a/src/lib/thread/compat_winthreads.c
+++ b/src/lib/thread/compat_winthreads.c
@@ -146,7 +146,7 @@ tor_cond_wait(tor_cond_t *cond, tor_mutex_t *lock_, const struct timeval *tv)
 {
   // recursive SRW locks are not supported because they need extra logic for
   // acquiring and releasing but SleepConditionVariableSRW will use the OS
-  // lock relase function which lacks our extra logic
+  // lock release function which lacks our extra logic
   tor_assert(lock_->type == NON_RECURSIVE);
   SRWLOCK *lock = &lock_->mutex;
   DWORD ms = INFINITE;