squawker vs unpleasant person

squawker and unpleasant person both are nouns.

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

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

Other hypernyms of squawker include disagreeable person.

squawker (noun)	unpleasant person (noun)
the loudspeaker on an intercom or public address system	a person who is not pleasant or agreeable
a person given to excessive complaints and crying and whining