alert Synonyms

lively brisk awake quick alarm alive watchful active notice aware attentive heedful zippy sharp snappy careful cautious signal conscious alarum agile caution wakeful vigilant warning perceptive prompt observant quick-witted sophic warn vigilance smart sleepless warner waking spanking spright undauntable ultimatum tocsin tense tendering tell vigilantly usbeks swarming spry sprightly siren