Synonyms of active

1 Syllable

quick, fast, strong, going, spright, pdq

2 Syllables

working, sprightlier, vibrant, willing, busiest, grinder, sprightly, zippier, spunky, walking, flowing, smartly, youthful, hasty, feisty, running, restless, faster, astir, rustling, driving, rolling, perkier, puissant, speedy, inked, employed, strongest, unquiet, streaming, speeding, swarming, moving, friskier, jumping, hellbent, perky, healthy, feistier, fastest, quicker, vivid, gumptious, rousing, hustling, busier, nimblest, peppier, fasted, alert, nimbler, bustling, pushing, rushing, turning, quickest, frisky, peppy, spunkier, asap, zippy, rapid, stronger, busy, shifting, chop-chop, sleepless

3 Syllables

unflagging, functioning, traveling, industrious, tireless, unsettled, athletic, kinetic, eventful, unfaded, vigorous, cursive, mobile, agile, spirited, reactive, movable, occupied, rapider, diligent, forcible, vivacious, sedulous, unwearied, unwearying, alive, takeover, simmering, weariless, efficient, assiduous, galvanic, impellent, dexterous, impelling, take-charge, take-over, hard-driving, stylishly, alerting, militant, undimmed, double-time, screamin', open-eyed

4 Syllables

resourceful, hypersonic, rosy-cheeked, propulsive, peaches-and-cream, unwithered, instrumental, vinegary, effective, unretiring, nimble-witted, fairylike, progressive, easy-moving, dynamical, animated, expeditious, operating, efficacious, exertive, gladiatorial, responsive, wide-awake, heavy-duty, assertory, enterprising, harefooted, energetic

5 Syllables

operative

6 Syllables

indefatigable