forgetful

Synonyms: absent absent-minded abstracted airheaded amnemonic amnesic asleep on the job bemused careless distracted dreamy heedless inattentive lax like an absent-minded professor looking out window mooning moony neglectful negligent nirvanic not on the job oblivious out of it out to lunch pipe dreaming preoccupied remiss slack sloppy unmindful unwitting woolgathering

Antonyms: attentive mindful recalling remembering retentive