stalemate vs impasse

stalemate and impasse both are nouns.

Word	Noun	Adjective	Verb	Adverb
stalemate	Yes	No	Yes	No
impasse	Yes	No	No	No

As nouns, stalemate and impasse are synonyms defined as:

stalemate and impasse: a situation in which no progress can be made or no advancement is possible

Other synonyms of stalemate include dead end, deadlock, standstill.

stalemate (noun)	impasse (noun)
drawing position in chess: any of a player's possible moves would place his king in check	a street with only one way in or out
a situation in which no progress can be made or no advancement is possible	a situation in which no progress can be made or no advancement is possible

stalemate (verb)	impasse (verb)
subject to a stalemate