cadaver vs stiff

cadaver and stiff both are nouns.

Word	Noun	Adjective	Verb	Adverb
cadaver	Yes	No	No	No
stiff	Yes	Yes	No	Yes

As nouns, cadaver and stiff are synonyms defined as:

Other synonyms of cadaver include clay, corpse, remains.

cadaver (noun)	stiff (noun)
the dead body of a human being	the dead body of a human being
	an ordinary man

cadaver (adjective)	stiff (adjective)
	having a strong physiological or chemical effect
	rigidly formal
	not moving or operating freely
	very drunk
	marked by firm determination or resolution; not shakable
	strong, vigorous
	incapable of or resistant to bending

cadaver (adverb)	stiff (adverb)
	in a stiff manner
	to a great degree