stiff vs remains

stiff and remains both are nouns.

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

As nouns, stiff and remains are synonyms defined as:

Other synonyms of stiff include cadaver, clay, corpse.

stiff (noun)	remains (noun)
the dead body of a human being	the dead body of a human being
an ordinary man	any object that is left unused or still extant
	a relic that has been excavated from the soil

stiff (adjective)	remains (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)	remains (adverb)
in a stiff manner
to a great degree