WordNet sense 1 (a very attractive or seductive looking woman):

beauty, dish, looker, peach, ravisher, smasher, sweetheart, lulu, mantrap, stunner

WordNet sense 2 (very strong or vigorous):

hard, severe

WordNet sense 3 (having strength or power greater than average or expected):

strong

WordNet sense 4 (a blow that renders the opponent unconscious):

kayo, KO