WordNet sense 1 (not unconscious; especially having become conscious):

alert

WordNet sense 2 (knowing and perceiving; having awareness of surroundings and sensations and thoughts):

conscious

WordNet sense 3 ((usually followed by `to') showing acute awareness; mentally perceptive):

alive

WordNet sense 4 ((sometimes followed by `of') having or showing knowledge or understanding or realization or perception):

aware, cognizant, cognisant

WordNet sense 5 (marked by full consciousness or alertness):

waking

WordNet sense 6 (experiencing or accompanied by sleeplessness):

watchful

WordNet sense 7 (stop sleeping):

arouse, awaken, wake, waken, wake up, come alive