nut case vs nut

nut case and nut both are nouns.

Word	Noun	Adjective	Verb	Adverb
nut case	Yes	No	No	No
nut	Yes	No	Yes	No

As nouns, nut case and nut are synonyms defined as:

Other synonyms of nut case include crackpot, crank, fruitcake, screwball.

nut case (noun)	nut (noun)
a whimsically eccentric person	a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bolt
	one of the two male reproductive glands that produce spermatozoa and secrete androgens
	someone who is so ardently devoted to something that it resembles an addiction
	a whimsically eccentric person
	usually large hard-shelled seed
	half the width of an em

nut case (verb)	nut (verb)
	gather nuts