1. Ready to fall asleep
   "sleepyheaded students"
   - sleepy, sleepy-eyed

See also: asleep

• Oriental Studies
• orientalise
• orientalism
• orientalist
• orientalize
• orientate
• orientated
• orientating
• orientation
• orientation course
• oriented
• orienteering
• orienting
• orifice
• oriflamme
• origami
• origanum
• Origanum dictamnus
• Origanum majorana
• Origanum vulgare
• Origen
• origin
• original
• original sin
• originalism