precis vs apercu

precis and apercu both are nouns.

Word	Noun	Adjective	Verb	Adverb
precis	Yes	No	Yes	No
apercu	Yes	No	No	No

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

Other hyponyms of precis include brief, epitome.

precis (noun)	apercu (noun)
a sketchy summary of the main points of an argument or theory	a short synopsis

precis (verb)	apercu (verb)
make a summary (of)