poor fish vs pillock

poor fish and pillock both are nouns.

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

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

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

poor fish (noun)	pillock (noun)
a person who is not very bright	a person who is not very bright