| museful(adjective, reasonable, keen, deep, rational) |
| oblivious(adjective, anxious, distant, distracted, absorbed) |
| taken up(expression, adjective, distracted, absorbed, engaged) |
| thoughtful(adjective, reasonable, keen, deep, sober) |
| woolgathering(adjective, anxious, distant, distracted, absorbed) |
| lost(adjective, thoughtful, distant, distracted, absorbed) |
| absentminded |
| airheaded(adjective, anxious, distant, distracted, absorbed) |
| analytical(adjective, reasonable, keen, deep, rational) |
| asleep(adjective, distant, distracted, absorbed, engaged) |
| attentive(adjective, reasonable, thoughtful, serious, thinking) |
| brainy(adjective, reasonable, keen, deep, rational) |
| brooding(adjective, thoughtful, thinking, absorbed, pensive) |
| bugged(adjective, distant, distracted, absorbed, engaged) |
| buried in thought(expression, idiom) |
| calculating(adjective, reasonable, keen, deep, rational) |
| castle-building |
| cerebral(adjective, reasonable, keen, deep, rational) |
| cogitative(adjective, reasonable, keen, deep, thoughtful) |
| contemplating |