churl vs crabby person

churl and crabby person both are nouns.

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

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

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

churl (noun)	crabby person (noun)
a crude uncouth ill-bred person lacking culture or refinement	a quarrelsome grouch
a bad-tempered person
a selfish person who is unwilling to give or spend