nagger vs disagreeable person

nagger and disagreeable person both are nouns.

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

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

nagger: someone (especially a woman) who annoys people by constantly finding fault
disagreeable person: a person who is not pleasant or agreeable

Other hypernyms of nagger include unpleasant person.

nagger (noun)	disagreeable person (noun)
someone (especially a woman) who annoys people by constantly finding fault	a person who is not pleasant or agreeable