diff --git a/programs/pkey/dh_genprime.c b/programs/pkey/dh_genprime.c
index 331838b..3e81d13 100644
--- a/programs/pkey/dh_genprime.c
+++ b/programs/pkey/dh_genprime.c
@@ -42,7 +42,7 @@
 
 #define USAGE \
     "\n usage: dh_genprime param=<>...\n"                                   \
-    "\n acceprable parameters:\n"                                           \
+    "\n acceptable parameters:\n"                                           \
     "    bits=%%d           default: 2048\n"
 
 #define DFL_BITS    2048
diff --git a/programs/psa/aead_demo.c b/programs/psa/aead_demo.c
index c4ed0dd..1efd132 100644
--- a/programs/psa/aead_demo.c
+++ b/programs/psa/aead_demo.c
@@ -104,7 +104,7 @@
 
 /* Run a PSA function and bail out if it fails.
  * The symbolic name of the error code can be recovered using:
- * programs/psa/psa_consant_name status <value> */
+ * programs/psa/psa_constant_name status <value> */
 #define PSA_CHECK( expr )                                       \
     do                                                          \
     {                                                           \
diff --git a/programs/psa/hmac_demo.c b/programs/psa/hmac_demo.c
index 6238892..f949a89 100644
--- a/programs/psa/hmac_demo.c
+++ b/programs/psa/hmac_demo.c
@@ -81,7 +81,7 @@
 
 /* Run a PSA function and bail out if it fails.
  * The symbolic name of the error code can be recovered using:
- * programs/psa/psa_consant_name status <value> */
+ * programs/psa/psa_constant_name status <value> */
 #define PSA_CHECK( expr )                                       \
     do                                                          \
     {                                                           \
diff --git a/programs/ssl/dtls_client.c b/programs/ssl/dtls_client.c
index 23a34e0..d13ea28 100644
--- a/programs/ssl/dtls_client.c
+++ b/programs/ssl/dtls_client.c
@@ -343,5 +343,5 @@
     mbedtls_exit( ret );
 }
 #endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_PROTO_DTLS && MBEDTLS_NET_C &&
-          MBEDTLD_TIMING_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
+          MBEDTLS_TIMING_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
           MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_RSA_C && MBEDTLS_PEM_PARSE_C */
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 1b4a94a..d0c4154 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -1949,7 +1949,7 @@
              * is not recommended in practice.
              * `psk_or_ephemeral` exists in theory, we need this mode to test if
              * this setting work correctly. With this key exchange setting, server
-             * should always perform `ephemeral` handshake. `psk` or `psk_ephermal`
+             * should always perform `ephemeral` handshake. `psk` or `psk_ephemeral`
              * is not expected.
              */
             else if( strcmp( q, "psk_or_ephemeral" ) == 0 )
diff --git a/programs/test/benchmark.c b/programs/test/benchmark.c
index ecb093e..6313c52 100644
--- a/programs/test/benchmark.c
+++ b/programs/test/benchmark.c
@@ -416,7 +416,7 @@
     Sleep( alarmMs );
     mbedtls_timing_alarmed = 1;
     /* _endthread will be called implicitly on return
-     * That ensures execution of thread funcition's epilogue */
+     * That ensures execution of thread function's epilogue */
 }
 
 static void mbedtls_set_alarm( int seconds )
diff --git a/programs/test/udp_proxy.c b/programs/test/udp_proxy.c
index e3386d1..ccd1303 100644
--- a/programs/test/udp_proxy.c
+++ b/programs/test/udp_proxy.c
@@ -377,7 +377,7 @@
 
 #if defined(MBEDTLS_TIMING_C)
 /* Return elapsed time in milliseconds since the first call */
-static unsigned ellapsed_time( void )
+static unsigned elapsed_time( void )
 {
     static int initialized = 0;
     static struct mbedtls_timing_hr_time hires;
@@ -413,9 +413,9 @@
     int ret;
 
     mbedtls_printf( "  %05u flush    %s: %u bytes, %u datagrams, last %u ms\n",
-                    ellapsed_time(), buf->description,
+                    elapsed_time(), buf->description,
                     (unsigned) buf->len, buf->num_datagrams,
-                    ellapsed_time() - buf->packet_lifetime );
+                    elapsed_time() - buf->packet_lifetime );
 
     ret = mbedtls_net_send( buf->ctx, buf->data, buf->len );
 
@@ -427,7 +427,7 @@
 
 static unsigned ctx_buffer_time_remaining( ctx_buffer *buf )
 {
-    unsigned const cur_time = ellapsed_time();
+    unsigned const cur_time = elapsed_time();
 
     if( buf->num_datagrams == 0 )
         return( (unsigned) -1 );
@@ -467,7 +467,7 @@
 
     buf->len += len;
     if( ++buf->num_datagrams == 1 )
-        buf->packet_lifetime = ellapsed_time();
+        buf->packet_lifetime = elapsed_time();
 
     return( (int) len );
 }
@@ -517,10 +517,10 @@
 #if defined(MBEDTLS_TIMING_C)
     if( why == NULL )
         mbedtls_printf( "  %05u dispatch %s %s (%u bytes)\n",
-                ellapsed_time(), p->way, p->type, p->len );
+                elapsed_time(), p->way, p->type, p->len );
     else
         mbedtls_printf( "  %05u dispatch %s %s (%u bytes): %s\n",
-                ellapsed_time(), p->way, p->type, p->len, why );
+                elapsed_time(), p->way, p->type, p->len, why );
 #else
     if( why == NULL )
         mbedtls_printf( "        dispatch %s %s (%u bytes)\n",
diff --git a/programs/x509/cert_req.c b/programs/x509/cert_req.c
index 30b389a..4879583 100644
--- a/programs/x509/cert_req.c
+++ b/programs/x509/cert_req.c
@@ -355,7 +355,7 @@
     if( ( ret = write_certificate_request( &req, opt.output_file,
                                            mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
     {
-        mbedtls_printf( " failed\n  !  write_certifcate_request %d", ret );
+        mbedtls_printf( " failed\n  !  write_certificate_request %d", ret );
         goto exit;
     }
 
diff --git a/programs/x509/cert_write.c b/programs/x509/cert_write.c
index f9366fe..a8910d7 100644
--- a/programs/x509/cert_write.c
+++ b/programs/x509/cert_write.c
@@ -752,7 +752,7 @@
         if( ret != 0 )
         {
             mbedtls_strerror( ret, buf, sizeof(buf) );
-            mbedtls_printf( " failed\n  !  x509write_crt_set_basic_contraints "
+            mbedtls_printf( " failed\n  !  x509write_crt_set_basic_constraints "
                             "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf );
             goto exit;
         }