potent vs stiff

potent is not a noun while stiff is a noun.

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

As adjectives, potent and stiff are synonyms defined as:

Other synonyms of potent include strong.

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

potent (adjective)	stiff (adjective)
having a strong physiological or chemical effect	having a strong physiological or chemical effect
(of a male) capable of copulation	rigidly formal
having great influence	not moving or operating freely
having or wielding force or authority	very drunk
	marked by firm determination or resolution; not shakable
	strong, vigorous
	incapable of or resistant to bending

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