on the qui vive Synonyms

alertness sharp-sightedness antipathetically all ears paying attention keeping one's eyes skinned wide-awake watchful wary vigilant sharp on guard on one's toes on the lookout waiting on keeping a weather eye open with eyes like a hawk not missing a trick keeping one's eyes peeled keeping one's eyes open on one's guard with one's eyes open on tiptoe percipient perceptive awake attentive anxiously anxious alertly alert agog acute active aware canny careful observant noticing mindful intent heedful heeding circumspect chary cautious absorbed