plateau vs mesa

plateau and mesa both are nouns.

Word	Noun	Adjective	Verb	Adverb
plateau	Yes	No	No	No
mesa	Yes	No	No	No

As nouns, mesa is a hyponym of plateau; that is, mesa is a word with a more specific, narrower meaning than plateau:

Other hyponyms of plateau include table, bench, terrace.

plateau (noun)	mesa (noun)
a relatively flat highland	flat tableland with steep edges