stiff vs cadaver

stiff and cadaver both are nouns.

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

As nouns, stiff and cadaver are synonyms defined as:

Other synonyms of stiff include clay, corpse, remains.

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

stiff (adjective)	cadaver (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

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