As nouns the difference between prowess and powers
is that
prowess is skillfulness and manual ability; adroitness or dexterity while
Powers is plural of Power|lang=en.
As a verb powers is
third person singular simple present form of
to power.
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