stinker vs unpleasant person

stinker and unpleasant person both are nouns.

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

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

Other hypernyms of stinker include disagreeable person.

stinker (noun)	unpleasant person (noun)
an artifact (especially an automobile) that is defective or unsatisfactory	a person who is not pleasant or agreeable
anything that gives off an offensive odor (especially a cheap cigar)
a person who is deemed to be despicable or contemptible