Synonyms of alert

1 Syllable
spry, smart, sharp, quick, hip, brisk, soss, glued, wise, cued, prompt, cuing, keen, spright, spryer, bright, spryest, seeing, warn, bleep
2 Syllables
sprightlier, wired, sleepless, sprightly, spunky, clever, smartest, intent, waking, go-go, astir, blinker, smarter, keener, perkier, living, dashing, beacon, discreet, wary, cagey, enrapt, brisker, prompter, beacons, scare, cautious, jazzed, smarted, watchful, perky, ablest, sentient, quicker, blinkers, pharos, mayday, gumptious, rousing, keenest, nimblest, chipper, signals, peppier, tocsin, ready, nimbler, radioing, knowhow, watching, abler, quickest, mindful, heedful, peppy, spunkier, radioed, asap, gogo, rested, warier
3 Syllables
aroused, arouse, arousing, unfaded, careful, eggheaded, alarum, agile, spirited, alarums, livelier, aware, untired, vivacious, circumspect, riveted, observing, insightful, quick-witted, cleverest, vigilant, sharp-sighted, notify, cleverer, forearmed, active, liveliest, observant, swashbuckling, heliograph, forewarns, forewarn, expectant, appetent, notifying, cautioned, notified, lively, undimmed, ironic
4 Syllables
forewarned, peaches-and-cream, unwithered, intelligent, unfatigued, perceptive, knowledgeable, forethoughtful, balefire, fairylike, perspicacious, easy-moving, attentive, animated, expeditious, receptive, wide-awake, enterprising, harefooted, double-edged
5 Syllables
paradoxical, precautionary, notification, penetrative, notifications, apperceptive, observative
6 Syllables
uncomplimentary