unsleeping Synonyms

wide-awake unfaltering sharp sedulous restless regardful ready rapt prepared plodding sleepless steadfast steady insomniac unflagging watchful wary wakeful waking vigilant unflinching persevering open-eyed chary cautious careful aware awake attentive assiduous alive alert circumspect conscious observant keen intent industrious indefatigable heedful guarded diligent constant acute