is a specific kind of: quality.

is a broader term that covers: effectiveness, potency, strength | valence, valency | valence, valency | preponderance | puissance | persuasiveness, strength | irresistibility, irresistibleness | interest, interestingness | chokehold, stranglehold, throttlehold | sway | influence | repellant, repellent | control | jurisdiction, legal power | disposal | discretion, free will | veto | effectiveness, effectivity, effectuality, effectualness ... show more.

is an attribute of: powerful | powerless.

is the opposite of: impotence, impotency, powerlessness.

derivation: herculean, powerful | potent, powerful.