watchful Synonyms

cautious heedful vigilant sleepless wakeful circumspect insomniac observant alert attentive quick-sighted surveillant suspicious tense vigilance patrolled vigilantly solicitous perceptive skeptical sheltering sharp precautious protective regardful prudent ready sensitive waker all ears on the ball on guard on one's toes on the alert on the job on the lookout overprotective unsleeping leery leary wary watchman wide-awake sharp-eyed on the qui vive basketeer keen-eyed beady-eyed apperceptive on one's guard