strength

n.

1. Power

   power, might, potency, force, vigor, brawn, energy, nerve, vitality, sinews, muscle, backbone, physique, thews, stoutness, health, toughness, fortitude, sturdiness, hardiness, stalwartness, tenacity, mana, robustness, soundness, durability.

   Antonyms weakness*, feebleness*, loss of energy.

2. Intensity

   force, depth, concentration, fervor; see force 3, intensity 1.

strength refers to the inherent capacity to act upon or affect something, to endure, to resist, etc. the strength to lift something, tensile strength; power, somewhat more general, applies to the ability, latent or exerted, physical or mental, to do something the power of the press, of a machine, etc.; force usually suggests the actual exertion of power, esp. in producing motion or overcoming opposition the force of gravity, the rebellion was put down by force; might suggests great or overwhelming strength or power with all one's might; energy specifically implies latent power for doing work or affecting something the energy in an atom, campaigned with unflagging energy; potency refers to the inherent capacity or power to accomplish something the potency of a drug

on the strength of