Synonyms and related words :
abandoned, active, acute, aggressive, animated, brisk, dynamic, energetic, enterprising, enthusiastic, forceful, forcible, full of pep, groovy, hearty, hep, hip, immoderate, impetuous, incisive, incontinent, indulgent, intemperate, intense, into, irrepressible, keen, kinetic, lax, licentious, lively, living, loose, lusty, mettlesome, nonrestrictive, on the beam, out of control, out of hand, peppy, permissive, rampant, really into, reinless, riotous, robust, smacking, snappy, spanking, spirited, strenuous, strong, take-charge, take-over, trenchant, unbridled, unchecked, uncoerced, uncompelled, uncurbed, unforced, ungoverned, uninhibited, unmastered, unmeasured, unmuzzled, unreined, unrepressed, unreserved, unrestrained, unrestrictive, unruly, unsubdued, unsuppressed, vibrant, vigorous, vivacious, vivid, wanton, wild, with it, zestful, zesty, zippy