Similar word to unwatchful:

absent, absentminded, apathetic, blind, bored, careless, distracted, distrait, distraught, diverted, dreamy, faraway, heedless, inadvertent, indifferent, inobservant, listless, lost, musing, neglectful, oblivious, off-guard, out to lunch, preoccupied, rapt, regardless, remiss, removed, scatterbrained, thoughtless, unconscious, undiscerning, unheeding, unmindful, unnoticing, unobservant, unobserving, unperceiving, unthinking, unwatchful, vague