pillock vs stupid person

pillock and stupid person both are nouns.

Word	Noun	Adjective	Verb	Adverb
pillock	Yes	No	No	No
stupid person	Yes	No	No	No

As nouns, pillock and stupid person are synonyms defined as:

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

pillock (noun)	stupid person (noun)
a person who is not very bright	a person who is not very bright