diff --git a/src/common/mythread.h b/src/common/mythread.h
index 4495e017..265147ea 100644
--- a/src/common/mythread.h
+++ b/src/common/mythread.h
@@ -180,7 +180,7 @@ mythread_join(mythread thread)
 }
 
 
-// Initiatlizes a mutex. Returns zero on success and non-zero on error.
+// Initializes a mutex. Returns zero on success and non-zero on error.
 static inline int
 mythread_mutex_init(mythread_mutex *mutex)
 {
diff --git a/src/common/tuklib_integer.h b/src/common/tuklib_integer.h
index 6dd2a5f7..7417a61d 100644
--- a/src/common/tuklib_integer.h
+++ b/src/common/tuklib_integer.h
@@ -625,7 +625,7 @@ write64le(uint8_t *buf, uint64_t num)
 // aligned but some compilers have language extensions to do that. With
 // such language extensions the memcpy() method gives excellent results.
 //
-// What to do on a strict-align system when no known language extentensions
+// What to do on a strict-align system when no known language extensions
 // are available? Falling back to byte-by-byte access would be safe but ruin
 // optimizations that have been made specifically with aligned access in mind.
 // As a compromise, aligned reads will fall back to non-compliant type punning
diff --git a/src/liblzma/api/lzma/base.h b/src/liblzma/api/lzma/base.h
index 75cdd72a..badfe3c2 100644
--- a/src/liblzma/api/lzma/base.h
+++ b/src/liblzma/api/lzma/base.h
@@ -258,7 +258,7 @@ typedef enum {
 		 */
 
 	/*
-	 * These eumerations may be used internally by liblzma
+	 * These enumerations may be used internally by liblzma
 	 * but they will never be returned to applications.
 	 */
 	LZMA_RET_INTERNAL1      = 101,
diff --git a/src/liblzma/common/filter_buffer_decoder.c b/src/liblzma/common/filter_buffer_decoder.c
index 6620986e..b7b140e7 100644
--- a/src/liblzma/common/filter_buffer_decoder.c
+++ b/src/liblzma/common/filter_buffer_decoder.c
@@ -24,7 +24,7 @@ lzma_raw_buffer_decode(
 			|| out_pos == NULL || *out_pos > out_size)
 		return LZMA_PROG_ERROR;
 
-	// Initialize the decoer.
+	// Initialize the decoder.
 	lzma_next_coder next = LZMA_NEXT_CODER_INIT;
 	return_if_error(lzma_raw_decoder_init(&next, allocator, filters));
 
diff --git a/src/liblzma/common/filter_common.c b/src/liblzma/common/filter_common.c
index fa0927cf..9d89ddf7 100644
--- a/src/liblzma/common/filter_common.c
+++ b/src/liblzma/common/filter_common.c
@@ -145,7 +145,7 @@ lzma_filters_copy(const lzma_filter *src, lzma_filter *real_dest,
 		return LZMA_PROG_ERROR;
 
 	// Use a temporary destination so that the real destination
-	// will never be modied if an error occurs.
+	// will never be modified if an error occurs.
 	lzma_filter dest[LZMA_FILTERS_MAX + 1];
 
 	lzma_ret ret;
diff --git a/src/scripts/xzgrep.in b/src/scripts/xzgrep.in
index 490e47d7..1e60d16c 100644
--- a/src/scripts/xzgrep.in
+++ b/src/scripts/xzgrep.in
@@ -275,7 +275,7 @@ for i; do
     test "$(kill -l "$xz_status" 2> /dev/null)" != "PIPE" && exit "$xz_status"
   elif test "$xz_status" -gt 0; then
     # Decompression failed but we will continue with the remaining
-    # files anwyway. Set exit status to at least 2 to indicate an error.
+    # files anyway. Set exit status to at least 2 to indicate an error.
     test "$r" -lt 2 && r=2
   fi