precis vs brief

precis and brief both are nouns.

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

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

Other hyponyms of precis include apercu, epitome.

precis (noun)	brief (noun)
a sketchy summary of the main points of an argument or theory	a condensed written summary or abstract
	a document stating the facts and points of law of a client's case

precis (adjective)	brief (adjective)
	concise and succinct
	(of clothing) very short
	of short duration or distance

precis (verb)	brief (verb)
make a summary (of)	give essential information to someone