cocksucker vs unpleasant person

cocksucker and unpleasant person both are nouns.

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

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

cocksucker: insulting terms of address for people who are stupid or irritating or ridiculous
unpleasant person: a person who is not pleasant or agreeable

Other hypernyms of cocksucker include disagreeable person.

cocksucker (noun)	unpleasant person (noun)
insulting terms of address for people who are stupid or irritating or ridiculous	a person who is not pleasant or agreeable
a person who performs fellatio