effectiveness vs potency

effectiveness and potency both are nouns.

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

As nouns, effectiveness and potency are synonyms defined as:

effectiveness and potency: capacity to produce strong physiological or chemical effects

Other synonyms of effectiveness include strength.

effectiveness (noun)	potency (noun)
power to be effective; the quality of being able to bring about an effect	capacity to produce strong physiological or chemical effects
capacity to produce strong physiological or chemical effects	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