potential vs potency

potential and potency both are nouns.

Word	Noun	Adjective	Verb	Adverb
potential	Yes	Yes	No	No
potency	Yes	No	No	No

As nouns, potential and potency are synonyms defined as:

Other synonyms of potential include potentiality.

potential (noun)	potency (noun)
the difference in electrical charge between two points in a circuit expressed in volts	capacity to produce strong physiological or chemical effects
the inherent capacity for coming into being	the power or right to give orders or make decisions
	the state of being potent; a male's capacity to have sexual intercourse
	the inherent capacity for coming into being

potential (adjective)	potency (adjective)
existing in possibility
expected to become or be; in prospect