fierceness

n [U].

fidget, fidgety, field, field hockey, Field Marshal, field officer, field sports, field-day, field-events, field-glasses, field-test, field-work, field-worker, fielder, fieldsman, fiend, fiendish, fiendishly, fierce, fiercely, fierily, fieriness, fiery, fiesta, FIFA, fife, fifteen, fifteenth, fifth, fifthly, fiftieth, fifty, fifty pence (also fifty p, 50p), fifty-fifty, fig, fig-leaf, fight, fighter, fighting, figment,