crank vs crabby person

crank and crabby person both are nouns.

Word	Noun	Adjective	Verb	Adverb
crank	Yes	Yes	Yes	No
crabby person	Yes	No	No	No

As nouns, crabby person is a hyponym of crank; that is, crabby person is a word with a more specific, narrower meaning than crank:

Other hyponyms of crank include crab, fire-eater, hothead, misanthrope, misanthropist.

crank (noun)	crabby person (noun)
a hand tool consisting of a rotating shaft with parallel handle	a quarrelsome grouch
an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
a bad-tempered person
a whimsically eccentric person

crank (adjective)	crabby person (adjective)
(used of boats) inclined to heel over easily under sail