be on the qui vive for Synonym

conscious, cognizant, mindful, alert, attentive, vigilant, observant, perceptive, informed, knowledgeable, apprised, sentient, sensible, awake, heedful, wary, watchful, alive, responsive, acquainted, familiar, enlightened, savvy, tuned in, hip to [x]

watch-for, keep-an-eye-out-for, be-alert-for, beigilant-for, be-watchful-for, be-on-guard-for, be-aware-of, be-wary-of, be-cautious-of, be-on-the-alert-for, be-on-the-watch-for, be-on-the-hunt-for, be-on-the-search-for, be-on-the-scout-for, be-on-the-qui-vive-for [x]

attentive, mindful, observant, alert, watchful, vigilant, cautious, careful, aware, conscientious, perceptive, considerate, circumspect, wary, prudent, discerning, heedful [x]

alert, vigilant, attentive, watchful, observant, ready, prepared, cautious, aware, sharp, quick, responsive, nimble, agile, awake, perceptive, mindful, wary, guarded, heedful, careful, prudent, circumspect, on guard, on the lookout, on the alert, on the ball, on the qui vive, on the watch [x]

alert, conscious, aware, wakeful, vigilant, attentive, roused, aroused, up, stirring, active, lively, cognizant, observant, perceptive, responsive, sharp, bright, quick, on the ball, on one's toes, on the alert, on guard, watchful, sleepless, unsleeping, wide-awake, clear-headed, clear-eyed, clear-sighted [x]

alert, vigilant, watchful, attentive, observant, sleepless, aware, conscious, perceptive, sharp, wary, heedful, mindful, on guard, on the lookout, on the alert, wide-awake, quick-eyed, eagle-eyed, sharp-eyed, clear-eyed, open-eyed, unsleeping, insomniac, restless, wakeful [x]

alert, vigilant, watchful, attentive, observant, aware, conscious, sharp, perceptive, quick, responsive, on guard, on the ball, on the lookout, on one's toes, ready, prepared, mindful, heedful, wary, sleepless, wakeful, unsleeping, bright-eyed, clear-headed, sharp-eyed, eagle-eyed, quick-witted, sharp-witted, on the alert, on the qui vive [x]

vigilant, watchful, attentive, observant, alert, cautious, wary, on guard, on the lookout, on one's toes, ready, prepared, aware, sharp-eyed, eagle-eyed, quick to notice, on the qui vive, on the ball, wide-awake, sleepless, wakeful, heedful, mindful, perceptive, responsive, alive, awake, conscious, sharp, keen [x]

vigilant, watchful, alert, observant, attentive, on guard, on the watch, on the alert, wary, cautious, eagle-eyed, sharp-eyed, wide-awake, on one's toes, on the qui vive, on the ball, quick off the mark, ready, prepared, primed, aware, heedful, mindful, circumspect, careful, awake, sleepless, unsleeping, wakeful, on the lookout [x]

advance notice, forewarning, heads-up, early warning, preliminary notice, advance alert, prior notice, pre-warning, advance notification, early alert, advance intimation, pre-notification, advance caution, prior alert, early notice, advance heads-up, pre-alert, advance advisory, prior intimation, early notification [x]

alert, forewarning, heads-up, notice, notification, caution, advance notice, advance warning, premonition, red flag, signal, tip-off, wake-up call, advisory, alarm, warning sign, heads-up alert, preliminary warning, prior warning, early alert, early notice, early signal, early indication, advance alert, advance signal, advance indication [x]

alert, attentive, sharp, quick, perceptive, aware, vigilant, responsive, observant, ready, prepared, focused, keen, astute, nimble, agile, smart, savvy, quick-witted, proactive [x]

alert, vigilant, watchful, attentive, cautious, wary, observant, prepared, ready, mindful, aware, guarded, circumspect, heedful, leery, suspicious, awake, sharp, perceptive, responsive, quick, eagle-eyed, sharp-eyed, on the lookout, on the alert, on the watch, on the qui vive, on one's toes, on the ball, on the job, on the case [x]

be vigilant about, be watchful about, be on guard about, be cautious about, be wary about, be attentive to, be observant of, be on the lookout for, be mindful of, be aware of [x]

watchful, vigilant, cautious, wary, on guard, attentive, observant, on the lookout, on the watch, alert, on one's toes, ready, prepared, on the qui vive, on the ball, eagle-eyed, sharp-eyed, wide-awake, quick to notice, perceptive, aware, heedful, mindful, circumspect, careful, awake, alive, responsive, reactive, on the defensive, on the alert [x]