Gibraltar, Oregon boat, adamant, adamantine, aluminum, americium, aureate, barium, beryllium, bicycle, bike, bilbo, bismuth, bond, bonds, bone, brass, brassy, brazen, brick, bridle, bronze, bronzy, buff, buffer, cadmium, calcium, calender, camisole, cast-iron
, cement, cerium, cesium, chains, chamois, chopper, chrome, chromium, cobalt, collar, concrete, copper, coppery, cuffs, cupreous, cuprous, cycle, diamond, dour, drag, dysprosium, erbium, europium, ferrous, ferruginous, fetter, fetters, firm, flint, flinty, fundamentalist, gadolinium, gag, gallium, germanium, gilt, glazer, gold, gold-filled, gold-plated, golden, goose, grader, granite, grim, gyves, halter, hamper, handcuffs, hard, hard-core, harrow, heart of oak, hidebound, hobbles, holmium, hopples, horse, hot-press, immovable, immutable, implacable, impliable, indium, inelastic, inexorable, inflexible, intransigent, iridium, ironbound, ironclad, ironhanded, ironlike, irons, irreconcilable, lanthanum, lead, leaden, leading strings, leash, lion, lithium, lutetium, magnesia, magnesium, manacle, manganese, mangle, marble, mercurial, mercurous, mercury, minibike, molybdenum, motocycle, motorbike, motorcycle, muscle-bound, muzzle, nails, neodymium, nickel, nickelic, nickeline, niobium, oak, obdurate, obstinate, orthodox, osmium, ox, palladium, pedicab, pewter, pewtery, phosphorus, pig, pillory, plane, platinum, polisher, polonium, potassium, praseodymium, press, procrustean, promethium, protactinium, purist, puristic, puritan, puritanic, quicksilver, radium, reins, relentless, restraint, restraints, rhenium, rigid, rigorist, rigoristic, rigorous, road-bike, rock, rock-ribbed, rockbound, roll, roller, rolling pin, rubidium, ruthenium, samarium, sander, scandium, shackle, silver, silver-plated, silvery, sodium, steamroller, steel, steely, stern, stiff, stocks, stone, straightjacket, straightlaced, strait-waistcoat, straitjacket, straitlaced, stranglehold, strontium, stubborn, tantalum, technetium, terbium, tether, thallium, thulium, tin, tinny, titanium, trail bike, trammel, trammels, tricycle, trike, trowel, tungsten, unaffected, unalterable, unbending, unchangeable, uncompromising, ungiving, unmoved, unrelenting, unyielding, uranium, vanadium, wheel, wolfram, wringer, yoke, ytterbium, yttrium, zinc, zirconium
resolution, determination, will, iron
will, unconquerable will, will of one's own, decision, resolution, backbone, clear grit, true grit, grit, sand, strength of mind, strength of will, resolve, firmness, energy, manliness, vigor, game, pluck, resoluteness, zeal, aplomb, desperation, devotion, devotedness, mastery over self, self control, self command, self possession, self reliance, self government, self restraint, self conquest, self denial, moral courage, moral strength, perseverance, tenacity, obstinacy, bulldog, British lion, resolved, determined, strong-willed, strong-minded, resolute, self-possessed, decided, definitive, peremptory, tranchant, unhesitating, unflinching, unshrinking, firm, iron
, gritty, indomitable, game to the backbone, inexorable, relentless, not to be shaken, not to be put down, tenax propositi, inflexible, obstinate, steady, earnest, serious, set upon, bent upon, intent upon, steel against, proof against, in utrumque paratus, resolutely, in earnest, in good earnest, seriously, joking apart, earnestly, heart and soul, on one's mettle, manfully, like a man, with a high hand, with a strong hand, at any rate, at any risk, at any hazard, at any price, at any cost, at any sacrifice, at all hazards, at all risks, at all events, a' bis ou a blanc, cost what it may, coute, a tort et a travers, once for all, neck or nothing, rain or shine, spes sibi quisque, celui qui veut celui-la peut, chi non s'arrischia non guadagna, frangas non flectes, manu forti, tentanda via est.
strength, power, energy, vigor, force, main force, physical force, brute force, spring, elasticity, tone, tension, tonicity, stoutness, lustihood, stamina, nerve, muscle, sinew, thews and sinews, physique, pith, pithiness, virtility, vitality, athletics, athleticism, gymnastics, feats of strength, adamant, steel, iron
, oak, heart of oak, iron
grip, grit, bone, athlete, gymnast, acrobat, superman, Atlas, Hercules, Antaeus, Samson, Cyclops, Goliath, tower of strength, giant refreshed, strengthening, invigoration, refreshment, refocillation, dynamics, statics, strong, mighty, vigorous, forcible, hard, adamantine, stout, robust, sturdy, hardy, powerful, potent, puissant, valid, resistless, irresistible, invincible, proof against, impregnable, unconquerable, indomitable, dominating, inextinguishable, unquenchable, incontestable, more than a match for, overpowering, overwhelming, all powerful, all sufficient, sovereign, able-bodied, athletic, Herculean, Cyclopean, Atlantean, muscular, brawny, wiry, well-knit, broad-shouldered, sinewy, strapping, stalwart, gigantic, manly, man-like, manful, masculine, male, virile, unweakened, unallayed, unwithered, unshaken, unworn, unexhausted, in full force, in full swing, in the plenitude of power, stubborn, thick-ribbed, made of iron
, deep-rooted, strong as a lion, strong as a horse, strong as an ox, strong as brandy, sound as a roach, in fine feather, in high feather, built like a brick shithouse, like a giant refreshed, strongly, by force, by main force, our withers are unwrung, Blut und Eisen, coelitus mihi vires, du fort au diable, en habiles gens, ex vi termini, flecti non frangi, he that wrestles with us strengthens our nerves an, inflexible in faith invincible in arms.
smooth, smoothen, plane, file, mow, shave, level, roll, macadamize, polish, burnish, calender, glaze, iron
, hot-press, mangle, lubricate.
hardness, rigidity, renitence, renitency, inflexibility, temper, callosity, durity, induration, petrifaction, lapidification, lapidescence, vitrification, ossification, crystallization, stone, pebble, flint, marble, rock, fossil, crag, crystal, quartz, granite, adamant, bone, cartilage, hardware, heart of oak, block, board, deal board, iron
, steel, cast iron
, decarbonized iron
, wrought iron
, nail, brick, concrete, cement, hard, rigid, stubborn, stiff, firm, starch, starched, stark, unbending, unlimber, unyielding, inflexible, tense, indurate, indurated, gritty, proof, adamant, adamantine, adamantean, concrete, stony, granitic, calculous, lithic, vitreous, horny, corneous, bony, osseous, ossific, cartilaginous, hard as a rock, stiff as buckram, stiff as a poker, stiff as starch, stiff as as board.