Antaeus, Atlas, Briareus, Brobdingnagian, Charles Atlas, Cyclops, Goliath, Herculean, Hercules, Mafioso, OK, Polyphemus, Samson, Spartan, Spartanic, Superman, Tarzan, Titan, Young Turk, abiding, abstruse, ace-high, acute, adamant, adamantine, adherent, adhesive, age-long, aged, amylaceous, ancient, antique, arbitrary, arduous, astringent, athletic, austere, authoritarian, backbreaking, bad, baffling, bang-up, battler, beast, beldam, belligerent, belted knight, berserk, berserker, beyond one, bickerer, blade, bomber, bony, bonzer, boss, bravo, brawler, brawny, bruiser, brutal, brute, bulky, bulldogged, bulldoggish, bulldoggy, bullheaded, bully, bullyboy, burdensome, burly, but good, callous, cartilaginous, cement, cemental, chewy, chronic, clabbered, clammy, clingy, clotted, coagulated, cohesive, cold, colossus, combatant, competitor, complex, complicated, concrete, confirmed, constant, contender, contestant, continuing, cool, coriaceous, corking, corneous, crabbed, crackerjack, cramp, critical, crushing, curdled, cutting, dandy, delicate, delicious, demanding, demon, dense, devil, diamondlike, difficile, difficult, disputant, diuturnal, doughty, doughy, dour, dragon, drastic, ducky, duelist, durable, dure, effortful, enduring, enforcer, evergreen, exacting, excessive, exigent, exorbitant, extravagant, extreme, fab, fencer, feuder, fibrous, fiend, fierce, fighter, fighting cock, fine and dandy, fire-eater, firebrand, firm, fixed, flintlike, flinty, foilsman, forced, formidable, furious, fury, game, gamecock, gamy, garbled, gaumy, gear, gelatinous, giant, gladiator, glairy, gluelike, gluey, glutenous, glutinose, glutinous, gooey, goon, gorilla, granitelike, granitic, great, grim, gristly, gritty, groovy, grueling, grumous, gumbo, gumbolike, gumlike, gummous, gummy, gun, gunsel, gutsy, gutty, hairy, hard, hard as nails, hard to understand, hard-bitten, hard-boiled, hard-earned, hard-fought, hard-line, hard-nosed, hard-set, hardened, hardhearted, hardnose, hardy, harsh, hatchet man, heavy, hefty, hell-raiser, hellcat, hellhound, hellion, holy terror, hood, hoodlum, hooligan, horny, hot, hothead, hotspur, hunky-dory, icy, immoderate, immutable, incendiary, inflexible, inspissated, intemperate, intense, intractable, intransient, intrepid, intricate, inured, inveterate, irksome, iron-hard, ironlike, jam-up, jawbreaking, jelled, jellied, jellylike, jouster, jumbled, just dandy, keen, killer, killing