Synonyms of alert

1. alert, qui vive, readiness, preparedness, preparation: usage: condition of heightened watchfulness or preparation for action; "bombers were put on alert during the crisis"
2. alert, alerting, warning: usage: a warning serves to make you more alert to danger
3. alarm, alert, warning signal, alarum, signal, signaling, sign: usage: an automatic signal (usually a sound) warning of danger

1. alarm, alert, warn: usage: warn or arouse to a sense of danger or call to a state of preparedness; "The empty house alarmed him"; "We alerted the new neighbors to the high rate of burglaries"

1. alert (vs. unalert), watchful, argus-eyed, open-eyed, vigilant, wakeful, fly, heads-up, wide-awake, lidless, sleepless, awake, lively, wary: usage: engaged in or accustomed to close observation; "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty"
2. alert, brisk, lively, merry, rattling, snappy, spanking, zippy, energetic (vs. lethargic): usage: quick and energetic; "a brisk walk in the park"; "a lively gait"; "a merry chase"; "traveling at a rattling rate"; "a snappy pace"; "a spanking breeze"
3. alert, alive(predicate), awake(predicate), aware(predicate) (vs. unaware), cognizant, cognisant: usage: mentally perceptive and responsive;"an alert mind"; "alert to the problems"; "alive to what is going on"; "awake to the dangers of her situation"; "was now awake to the reality of his predicament"