fait accompli vs accomplishment

fait accompli and accomplishment both are nouns.

Word	Noun	Adjective	Verb	Adverb
fait accompli	Yes	No	No	No
accomplishment	Yes	No	No	No

As nouns, accomplishment is a hypernym of fait accompli; that is, accomplishment is a word with a broader meaning than fait accompli:

Other hypernyms of fait accompli include achievement.

fait accompli (noun)	accomplishment (noun)
an irreversible accomplishment	the action of accomplishing something
	an ability that has been acquired by training