klutz vs stupid

klutz and stupid both are nouns.

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

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

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

klutz (noun)	stupid (noun)
(Yiddish) a clumsy dolt	a person who is not very bright

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