diff --git a/FAQ.xml b/FAQ.xml
index cd216e6ec5..8bcd677eb1 100644
--- a/FAQ.xml
+++ b/FAQ.xml
@@ -220,7 +220,7 @@ view "chaos" chaos {
       <answer>
 	<para>
 	  This may be a clock skew problem.  Check that the the clocks
-	  on the client and server are properly synchronised (e.g.,
+	  on the client and server are properly synchronized (e.g.,
 	  using ntp).
 	</para>
       </answer>
diff --git a/bin/dig/dig.docbook b/bin/dig/dig.docbook
index a892597749..7230935947 100644
--- a/bin/dig/dig.docbook
+++ b/bin/dig/dig.docbook
@@ -322,7 +322,7 @@
 	<listitem>
 	  <para>
 	    Send the query to a non-standard port on the server,
-	    instead of the defaut port 53. This option would be used
+	    instead of the default port 53. This option would be used
 	    to test a name server that has been configured to listen
 	    for queries on a non-standard port number.
 	  </para>
diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index 64f5613918..41af815923 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -2908,7 +2908,7 @@ $ORIGIN 0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa.
 		  followed by '%' to represent percents.
 		</para>
 		<para>
-		  The behaviour is exactly the same as
+		  The behavior is exactly the same as
 		  <varname>size_spec</varname>, but
 		  <varname>size_or_percent</varname> allows also
 		  to specify a positive integer value followed by
@@ -9262,7 +9262,7 @@ avoid-v6-udp-ports { 40000; range 50000 60000; };
 		  may be sent while servicing a recursive query.
 		  If more queries are sent, the recursive query
 		  is terminated and returns SERVFAIL. Queries to
-		  look up top level comains such as "com" and "net"
+		  look up top level domains such as "com" and "net"
 		  and the DNS root zone are exempt from this limitation.
 		  The default is 75.
 		</para>
@@ -10123,7 +10123,7 @@ deny-answer-aliases { "example.net"; };
 		  <para>
 		    A special form of local data is a CNAME whose target is a
 		    wildcard such as *.example.com.
-		    It is used as if were an ordinary CNAME after the astrisk (*)
+		    It is used as if were an ordinary CNAME after the asterisk (*)
 		    has been replaced with the query name.
 		    The purpose for this special form is query logging in the
 		    walled garden's authority DNS server.
@@ -12615,7 +12615,7 @@ example.com. NS ns2.example.net.
 		    unsigned zone is transferred in or loaded from
 		    disk and a signed version of the zone is served,
 		    with possibly, a different serial number.  This
-		    behaviour is disabled by default.
+		    behavior is disabled by default.
 		  </para>
 		</listitem>
 	      </varlistentry>