Open English Wordnet
Adjectives
(s)argus-eyed, open-eyed, vigilant, wakeful, watchfulcarefully observant or attentive; on the lookout for possible danger“a policy of open-eyed awareness”,
“the vigilant eye of the town watch”,
“there was a watchful dignity in the room”,
“a watchful parent with a toddler in tow” (s)light, wakeful(of sleep) easily disturbed“in a light doze”,
“a light sleeper”,
“a restless wakeful night” (s)waking, wakefulmarked by full consciousness or alertness“worked every moment of my waking hours”