poor fish vs dullard

poor fish and dullard both are nouns.

Word	Noun	Adjective	Verb	Adverb
poor fish	Yes	No	No	No
dullard	Yes	No	No	No

As nouns, poor fish and dullard are synonyms defined as:

Other synonyms of poor fish include dolt, pillock, pudden-head, pudding head, stupe, stupid, stupid person.

poor fish (noun)	dullard (noun)
a person who is not very bright	a person who evokes boredom
	a person who is not very bright