grouch vs misanthropist

grouch and misanthropist both are nouns.

Word	Noun	Adjective	Verb	Adverb
grouch	Yes	No	Yes	No
misanthropist	Yes	No	No	No

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

Other hyponyms of grouch include crab, crabby person, fire-eater, hothead, misanthrope.

grouch (noun)	misanthropist (noun)
a bad-tempered person	someone who dislikes people in general

grouch (verb)	misanthropist (verb)
show one's unhappiness or critical attitude