diff --git a/src/addrman.h b/src/addrman.h
index b996839e..03926543 100644
--- a/src/addrman.h
+++ b/src/addrman.h
@@ -23,13 +23,13 @@ private:
     // where knowledge about this address first came from
     CNetAddr source;
 
-    // last succesfull connection by us
+    // last successful connection by us
     int64 nLastSuccess;
 
     // last try whatsoever by us:
     // int64 CAddress::nLastTry
 
-    // connection attempts since last succesful attempt
+    // connection attempts since last successful attempt
     int nAttempts;
 
     // reference count in new sets (memory only)
diff --git a/src/base58.h b/src/base58.h
index b492cd68..58149976 100644
--- a/src/base58.h
+++ b/src/base58.h
@@ -119,7 +119,7 @@ inline bool DecodeBase58(const char* psz, std::vector<unsigned char>& vchRet)
 }
 
 // Decode a base58-encoded string str into byte vector vchRet
-// returns true if decoding is succesful
+// returns true if decoding is successful
 inline bool DecodeBase58(const std::string& str, std::vector<unsigned char>& vchRet)
 {
     return DecodeBase58(str.c_str(), vchRet);
@@ -139,7 +139,7 @@ inline std::string EncodeBase58Check(const std::vector<unsigned char>& vchIn)
 }
 
 // Decode a base58-encoded string psz that includes a checksum, into byte vector vchRet
-// returns true if decoding is succesful
+// returns true if decoding is successful
 inline bool DecodeBase58Check(const char* psz, std::vector<unsigned char>& vchRet)
 {
     if (!DecodeBase58(psz, vchRet))
@@ -160,7 +160,7 @@ inline bool DecodeBase58Check(const char* psz, std::vector<unsigned char>& vchRe
 }
 
 // Decode a base58-encoded string str that includes a checksum, into byte vector vchRet
-// returns true if decoding is succesful
+// returns true if decoding is successful
 inline bool DecodeBase58Check(const std::string& str, std::vector<unsigned char>& vchRet)
 {
     return DecodeBase58Check(str.c_str(), vchRet);
diff --git a/src/sync.cpp b/src/sync.cpp
index dbd9ebda..54ad7de4 100644
--- a/src/sync.cpp
+++ b/src/sync.cpp
@@ -24,7 +24,7 @@ void PrintLockContention(const char* pszName, const char* pszFile, int nLine)
 //     --> may result in deadlock between the two threads, depending on when they run.
 // Solution implemented here:
 // Keep track of pairs of locks: (A before B), (A before C), etc.
-// Complain if any thread trys to lock in a different order.
+// Complain if any thread tries to lock in a different order.
 //
 
 struct CLockLocation
diff --git a/src/util.cpp b/src/util.cpp
index 9d0f9ab3..9881545a 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -1142,7 +1142,7 @@ void ShrinkDebugFile()
 // "Never go to sea with two chronometers; take one or three."
 // Our three time sources are:
 //  - System clock
-//  - Median of other nodes's clocks
+//  - Median of other nodes clocks
 //  - The user (asking the user to fix the system clock if the first two disagree)
 //
 static int64 nMockTime = 0;  // For unit testing
diff --git a/src/wallet.h b/src/wallet.h
index b2e0e526..9807ecec 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -69,7 +69,7 @@ private:
     // the current wallet version: clients below this version are not able to load the wallet
     int nWalletVersion;
 
-    // the maxmimum wallet format version: memory-only variable that specifies to what version this wallet may be upgraded
+    // the maximum wallet format version: memory-only variable that specifies to what version this wallet may be upgraded
     int nWalletMaxVersion;
 
 public: