brief vs legal brief

brief and legal brief both are nouns.

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

As nouns, brief and legal brief are synonyms defined as:

brief and legal brief: a document stating the facts and points of law of a client's case

brief (noun)	legal brief (noun)
a condensed written summary or abstract	a document stating the facts and points of law of a client's case
a document stating the facts and points of law of a client's case

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

brief (verb)	legal brief (verb)
give essential information to someone