Synonyms and related words :
abandoned, adamant, afire, ardent, assiduous, bent, bold, bound, bound and determined, bulldog, bulldoggish, burning, changeless, committed, constant, continuing, dauntless, decided, decisive, dedicated, definite, deliberate, determined, devoted, devout, diligent, dogged, earnest, enduring, experimental, faithful, fast, fervent, fervid, fiery, firm, flaming, game, gamy, gritty, gutsy, gutty, hearty, heated, hot, hot-blooded, immutable, impassioned, in earnest, inalterable, indefatigable, indomitable, industrious, inflexible, insistent, intense, intent, intent on, invincible, irreversible, lasting, loyal, mettlesome, nervy, never-tiring, obstinate, on fire, passionate, patient, patient as Job, perfervid, permanent, perseverant, persevering, persistent, persisting, pertinacious, plodding, plucky, plugging, preoccupied, purposeful, purposive, rapt, red-blooded, red-hot, relentless, resolved, sedulous, serious, set, settled, sincere, single-minded, sleepless, slogging, spirited, spiritful, spunky, stable, staunch, steadfast, steady, stubborn, tenacious, tentative, tireless, tough, trial, TRUE, unabating, unalterable, unchangeable, unchanging, unconquerable, undaunted, undeviating, undiscouraged, undrooping, unfailing, unfaltering, unflagging, unflinching, unhesitant, unhesitating, unintermitting, uninterrupted, unnodding, unrelaxing, unrelenting, unremitting, unshakable, unshakeable, unshaken, unsleeping, unswerving, untiring, unwavering, unwearied, unwearying, unwinking, utterly attentive, vehement, venturesome, warm, weariless, white-hot, wholehearted, willing, zealous