berk vs stupid

berk and stupid both are nouns.

Word	Noun	Adjective	Verb	Adverb
berk	Yes	No	No	No
stupid	Yes	Yes	No	No

As nouns, stupid is a hypernym of berk; that is, stupid is a word with a broader meaning than berk:

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

berk (noun)	stupid (noun)
a stupid person who is easy to take advantage of	a person who is not very bright

berk (adjective)	stupid (adjective)
	lacking or marked by lack of intellectual acuity
	lacking intelligence
	in a state of mental numbness especially as resulting from shock