"strength" en el diccionario Collins English Cobuild & Thesaurus

strength

1 backbone, brawn, brawniness, courage, firmness, fortitude, health, lustiness, might, muscle, robustness, sinew, stamina, stoutness, sturdiness, toughness

2 cogency, concentration, effectiveness, efficacy, energy, force, intensity, potency, power, resolution, spirit, vehemence, vigour, virtue (archaic)

3 advantage, anchor, asset, mainstay, security, strong point, succour, tower of strength

Antonyms

1 & 2 debility, feebleness, frailty, impotence, infirmity, powerlessness, weakness

3 Achilles heel, chink in one's armour, defect, failing, flaw, shortcoming, weakness