Key and Key word

Key noun - An explanatory list of the symbols on a map or chart.

Key word and key are semantically related In some cases you can use "Key word" instead a noun "Key".

Nearby Words: keyed, keyboard, keying

Key word noun - A word that is used as a pattern to decode an encrypted message.

Key and key word are semantically related in secret word given for entry topic. You can use "Key" instead a noun phrase "Key word".