diff --git a/matrix/buffer.py b/matrix/buffer.py
index 5caa7f2..7a8b474 100644
--- a/matrix/buffer.py
+++ b/matrix/buffer.py
@@ -1054,7 +1054,7 @@ class RoomBuffer(object):
         # operation (the nicks are added to a linked list sorted).
         # The search time is O(N * min(a,b)) where N is the number
         # of nicks already added and a/b are the length of
-        # the strings that are compared at every itteration.
+        # the strings that are compared at every iteration.
         # Because the search time get's increasingly longer we're
         # going to stop adding inactive users, they will be lazily added if
         # they become active.
@@ -1540,7 +1540,7 @@ class RoomBuffer(object):
             self.print_bad_event(event, extra_tags)
 
         elif isinstance(event, UnknownBadEvent):
-            self.error("Unkwnown bad event: {}".format(
+            self.error("Unknown bad event: {}".format(
                 pprint.pformat(event.source)
             ))
 
@@ -1633,7 +1633,7 @@ class RoomBuffer(object):
             line.tags = new_tags
 
     def replace_undecrypted_line(self, event):
-        """Find a undecrypted message in the buffer and replace it with the now
+        """Find an undecrypted message in the buffer and replace it with the now
         decrypted event."""
         # TODO different messages need different formatting
         # To implement this, refactor out the different formatting code
@@ -1660,7 +1660,7 @@ class RoomBuffer(object):
 
         data = formatted.to_weechat() if formatted else event.body
         # TODO this isn't right if the data has multiple lines, that is
-        # everything is printed on a signle line and newlines are shown as a
+        # everything is printed on a single line and newlines are shown as a
         # space.
         # Weechat should support deleting lines and printing new ones at an
         # arbitrary position.
diff --git a/matrix/commands.py b/matrix/commands.py
index 52a0754..62ea683 100644
--- a/matrix/commands.py
+++ b/matrix/commands.py
@@ -784,7 +784,7 @@ def olm_export_command(server, args):
     except (OSError, IOError) as e:
         server.error("Error exporting keys: {}".format(str(e)))
 
-    server.info("Succesfully exported keys")
+    server.info("Successfully exported keys")
 
 def olm_import_command(server, args):
     file_path = os.path.expanduser(args.file)
@@ -793,7 +793,7 @@ def olm_import_command(server, args):
     except (OSError, IOError, EncryptionError) as e:
         server.error("Error importing keys: {}".format(str(e)))
 
-    server.info("Succesfully imported keys")
+    server.info("Successfully imported keys")
 
 
 def olm_sas_command(server, args):
diff --git a/matrix/server.py b/matrix/server.py
index 1ef69c4..43db2ac 100644
--- a/matrix/server.py
+++ b/matrix/server.py
@@ -507,7 +507,7 @@ class MatrixServer(object):
             device = sas.other_olm_device
 
             if sas.verified:
-                self.info_highlight("Device {} of user {} succesfully "
+                self.info_highlight("Device {} of user {} successfully "
                                     "verified".format(
                                         device.id,
                                         device.user_id
@@ -1156,7 +1156,7 @@ class MatrixServer(object):
         return True
 
     def print_unconfirmed_message(self, room_buffer, message):
-        """Print an outoing message before getting a recieve confirmation.
+        """Print an outgoing message before getting a receive confirmation.
 
         The message is printed out greyed out and only printed out if the
         client is configured to do so. The message needs to be later modified
@@ -1484,7 +1484,7 @@ class MatrixServer(object):
         device = sas.other_olm_device
 
         if sas.verified:
-            self.info("Device {} of user {} succesfully verified".format(
+            self.info("Device {} of user {} successfully verified".format(
                 device.id,
                 device.user_id
             ))