dullard vs disagreeable person

dullard and disagreeable person both are nouns.

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

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

Other hypernyms of dullard include unpleasant person.

dullard (noun)	disagreeable person (noun)
a person who evokes boredom	a person who is not pleasant or agreeable
a person who is not very bright