Synonyms for enthusiastic

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1. Excited by something

   interested, fascinated, animated, willing, thrilled, fevered, feverish, flushed, concerned, pleased, excited, attracted, titillated, exhilarated, anxious, tantalized, athirst, ablaze, agog, intent, eager, heated, breathless, all hepped up*, keyed up*, charged up*, pumped up*, psyched up*, psyched*, dying to*.

   Antonyms indifferent*, detached, uninterested.

2. Strongly in favor of something

   keen, ardent, zealous, avid, passionate, fervent, enthused, inflamed, tireless, absorbed, rapt, devoted, diligent, resolute, indefatigable, desirous, eager, steadfast, assiduous, sleepless, impassioned, partial, voracious, yearning, longing, desiring, sedulous, burning, glowing, warm, spirited, zestful, fervid, ecstatic, transported, impatient, delighted, rapturous, enraptured, rhapsodic, intent, vehement, effusive, gushing, keen on, keen about, wild about*, crazy about*, mad about*, gone on*, hot on*, all worked up over*, nuts about*, gaga over*, jumping at*, all hopped up over*, ape over*, hot for*, gung-ho*, ready and willing*, champing at the bit*, dying to*, aching for*, aching to*, hyped on*.

   Antonyms opposed*, reluctant, apathetic.

3. Inclined to enthusiasm

   excitable, warm, ardent, forward, passionate, earnest, impetuous, impatient, aspiring, spirited, vivacious, effervescent, exuberant, willing, inclined, possessed, inspired, intense, hot, impulsive, fiery, rabid, sanguine, maniacal, ambitious, ebullient, mercurial, apt for, overeager, given to enthusiasm(s), not prudent, not restrained.

   Antonyms dull*, lethargic, sluggish.