potency vs effectiveness

potency and effectiveness both are nouns.

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

As nouns, potency and effectiveness are synonyms defined as:

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

Other synonyms of potency include strength.

potency (noun)	effectiveness (noun)
capacity to produce strong physiological or chemical effects	power to be effective; the quality of being able to bring about an effect
the power or right to give orders or make decisions	capacity to produce strong physiological or chemical effects
the state of being potent; a male's capacity to have sexual intercourse
the inherent capacity for coming into being