As nouns the difference between potency and prowess
is that potency is strength while prowess is skillfulness and manual ability; adroitness or dexterity.
potency
English
Noun
(potencies)
Strength
Power
The ability or capacity to perform something.
Related terms
* potence
* potent
* potentate
* potential
* potentiality
prowess
English
Noun
Skillfulness and manual ability; adroitness or dexterity.
Distinguished bravery or courage, especially in battle; heroism
References
* The Oxford Paperback Dictionary fourth edition ISBN 0-19-280012-4