stupid vs stupefied

stupid is a noun but stupefied is not a noun.

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

As adjectives, stupid and stupefied are synonyms defined as:

stupid and stupefied: in a state of mental numbness especially as resulting from shock

Other synonyms of stupid include dazed, stunned.

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

stupid (adjective)	stupefied (adjective)
lacking or marked by lack of intellectual acuity	in a state of mental numbness especially as resulting from shock
lacking intelligence	as if struck dumb with astonishment and surprise
in a state of mental numbness especially as resulting from shock