diff --git a/nse_libssh2.cc b/nse_libssh2.cc
index 2c1aa31f3..4ac23be70 100644
--- a/nse_libssh2.cc
+++ b/nse_libssh2.cc
@@ -1,5 +1,5 @@
 /*
-* Binding for the libssh2 library. Note that there is not a one-to-one correspondance
+* Binding for the libssh2 library. Note that there is not a one-to-one correspondence
 * between functions in libssh2 and the binding.
 * Currently, during the ssh2 handshake, a call to nsock.receive may result in an EOF
 * error. This appears to only occur when stressing the ssh server (ie during a brute
diff --git a/osscan2.cc b/osscan2.cc
index f2ceadabb..6095f9d68 100644
--- a/osscan2.cc
+++ b/osscan2.cc
@@ -296,7 +296,7 @@ int get_diffs(u32 *ipid_diffs, int numSamples, const u32 *ipids, int islocalhost
 
 }
 
-/* Indentify the ipid sequence for 32-bit IPID values (IPv6) */
+/* Identify the ipid sequence for 32-bit IPID values (IPv6) */
 int get_ipid_sequence_32(int numSamples, const u32 *ipids, int islocalhost) {
   int ipid_seq = IPID_SEQ_UNKNOWN;
   u32 ipid_diffs[32];
@@ -310,7 +310,7 @@ int get_ipid_sequence_32(int numSamples, const u32 *ipids, int islocalhost) {
   }
 }
 
-/* Indentify the ipid sequence for 16-bit IPID values (IPv4) */
+/* Identify the ipid sequence for 16-bit IPID values (IPv4) */
 int get_ipid_sequence_16(int numSamples, const u32 *ipids, int islocalhost) {
   int i;
   int ipid_seq = IPID_SEQ_UNKNOWN;
diff --git a/scan_engine.cc b/scan_engine.cc
index 0e96663f2..1d5bcecd2 100644
--- a/scan_engine.cc
+++ b/scan_engine.cc
@@ -265,7 +265,7 @@ GroupScanStats::GroupScanStats(UltraScanInfo *UltraSI) {
   USI = UltraSI;
   init_ultra_timing_vals(&timing, TIMING_GROUP, USI->numIncompleteHosts(), &(USI->perf), &USI->now);
   initialize_timeout_info(&to);
-  /* Default timout should be much lower for arp */
+  /* Default timeout should be much lower for arp */
   if (USI->ping_scan_arp)
     to.timeout = box(o.minRttTimeout(), o.initialRttTimeout(), INITIAL_ARP_RTT_TIMEOUT) * 1000;
   num_probes_active = 0;
diff --git a/targets.cc b/targets.cc
index 16659f391..24f39de4a 100644
--- a/targets.cc
+++ b/targets.cc
@@ -91,7 +91,7 @@ static void arpping(Target *hostbatch[], int num_hosts) {
   int targetno;
   targets.reserve(num_hosts);
 
-  /* Default timout should be much lower for arp */
+  /* Default timeout should be much lower for arp */
   int default_to = box(o.minRttTimeout(), o.initialRttTimeout(), INITIAL_ARP_RTT_TIMEOUT) * 1000;
   for (targetno = 0; targetno < num_hosts; targetno++) {
     initialize_timeout_info(&hostbatch[targetno]->to);
diff --git a/utils.h b/utils.h
index b0af43c10..d74fc1318 100644
--- a/utils.h
+++ b/utils.h
@@ -70,12 +70,12 @@
 #include "nbase.h"
 #include <assert.h>
 
-/* Arithmatic difference modulo 2^32 */
+/* Arithmetic difference modulo 2^32 */
 #ifndef MOD_DIFF
 #define MOD_DIFF(a,b) ((u32) (MIN((u32)(a) - (u32 ) (b), (u32 )(b) - (u32) (a))))
 #endif
 
-/* Arithmatic difference modulo 2^16 */
+/* Arithmetic difference modulo 2^16 */
 #ifndef MOD_DIFF_USHORT
 #define MOD_DIFF_USHORT(a,b) ((MIN((unsigned short)((unsigned short)(a) - (unsigned short ) (b)), (unsigned short) ((unsigned short )(b) - (unsigned short) (a)))))
 #endif