critic vs unpleasant person

critic and unpleasant person both are nouns.

Word	Noun	Adjective	Verb	Adverb
critic	Yes	No	No	No
unpleasant person	Yes	No	No	No

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

critic: someone who frequently finds fault or makes harsh and unfair judgments
unpleasant person: a person who is not pleasant or agreeable

Other hypernyms of critic include disagreeable person.

critic (noun)	unpleasant person (noun)
a person who is professionally engaged in the analysis and interpretation of works of art	a person who is not pleasant or agreeable
anyone who expresses a reasoned judgment of something
someone who frequently finds fault or makes harsh and unfair judgments