grouch vs disagreeable person

grouch and disagreeable person both are nouns.

Word	Noun	Adjective	Verb	Adverb
grouch	Yes	No	Yes	No
disagreeable person	Yes	No	No	No

As nouns, disagreeable person is a hypernym of grouch; that is, disagreeable person is a word with a broader meaning than grouch:

Other hypernyms of grouch include unpleasant person.

grouch (noun)	disagreeable person (noun)
a bad-tempered person	a person who is not pleasant or agreeable

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