Intense1. (a.) Strained; tightly drawn; kept on the stretch; strict; very close or earnest; as, intense study or application; intense thought.
2. (a.) Extreme in degree; excessive; immoderate; as: (a) Ardent; fervent; as, intense heat. (b) Keen; biting; as, intense cold. (c) Vehement; earnest; exceedingly strong; as, intense passion or hate. (d) Very severe; violent; as, intense pain or anguish. (e) Deep; strong; brilliant; as, intense color or light.
Thesaurus Entries
abandoned, ablaze, accentuated, active, acute, advertent, afire, aggravated, aggressive, agog, alert, all ears, all eyes, animated, ardent, assiduous, attentive, aware, boiling over, breathless, bright, bright-hued, brilliant, brisk, burning, careful, colorful, colory, committed, comprehensive, concentrated, conscious, consequential, considerable, consuming, cordial, cutting, deafening, dedicated, deep, deep-colored, delirious, desperate, devoted, devout, diligent, drastic, drunk, dynamic, eager, earnest, emotional, emphasized, energetic, enhanced, enterprising, enthusiastic, excessive, excited, excruciating, exhaustive, exorbitant, exotic, exquisite, extravagant, extreme, exuberant, faithful, fanatical, febrile, fervent, fervid, fevered, feverish, fierce, fiery, finical, finicking, finicky, flaming, flushed, forceful, forcible, frantic, frenzied, full, full of pep, furious, gay, gay-colored, glowing, go-go, gorgeous, grand, grave, great, hard, harsh, heartfelt, hearty, heated, heavy, heedful, heightened, high-colored, high-spirited, hot, hot-blooded, hotheaded, hysterical, immoderate, impassioned, impetuous, impulsive, in earnest, incisive, intemperate, intensified, intent, intent on, intentive, intoxicated, irresistible, keen, kinetic, lively, living, loud, loyal, lusty, main, maximum, meticulous, mettlesome, mighty, mindful, nervous, nice, niggling, observant, observing, on fire, on the ball, on the job, open-eared, open-eyed, openmouthed, outrageous, passionate, penetrating, peppy, perfervid, piercing, plenary, poignant, powerful, profound, pungent, red-hot, reeking, regardful, resolute, rich, rich-colored, rigorous, robust, rough, serious, severe, sharp, sincere, smacking, snappy, spanking, spirited, splitting, steaming, steamy, strenuous, stressed, strong, take-charge, take-over, temperamental, tense, terrible, testy, thundering, total, touchy, tough, trenchant, unconscionable, unrestrained, uptight, vehement, venomous, vibrant, vicious, vigorous, violent, virulent, vivacious, vivid, volatile, warm, watchful, white-hot, zealous, zestful, zesty, zippy