Synonyms to keep alert

look out, and listen, attend to business, be alert, be obsessed with, be vigilant, be watchful, beware, concentrate on, fix on, focus on, give heed, have a care, keep in sight, keep in view, keep vigil, keep watch, lie low, look, look about one, look lively, look sharp, mind, miss nothing, never nod, pay attention, pay heed, qui vive, scrutinize, stop, study, take care, take heed, watch, watch out, bear in mind, eye, eyeball, follow, gaze at, have a looksee, have regard for, hold in mind, hold in view, keep in mind, keep under observation, look after, look at, look on, look upon, observe, reckon with, reconnoiter, regard, scout, spy upon, take account of, take cognizance of, take heed of, take into account, take into consideration, take note of, take notice of, view, toss and turn, blunder, careen, career, count sheep, falter, fidget, flip out, flounce, flounder, flutter, frea