| abstraction(noun, state, study, class, exercise) |
| application(noun, study, class, exercise, thought) |
| appraising(verb, thinking) |
| consider |
| deliberative(adjective, reasonable, keen, deep, rational) |
| preoccupied(adjective, reasonable, keen, deep, rational) |
| serious(adjective, reasonable, keen, deep, thoughtful) |
| sober(adjective, reasonable, keen, deep, rational) |
| speculative(thoughtful, thinking, absorbed, pensive, reflective) |
| lost in thought(expression, adjective, idiom, keen, thoughtful) |
| absorbed(adjective, reasonable, keen, deep, thoughtful) |
| academic work(noun, expression, study, class, exercise) |
| analytical(adjective, reasonable, keen, deep, rational) |
| attentive(reasonable, thoughtful, serious, thinking, absorbed) |
| believing |
| brainstorming |
| brainwork(noun, thought, consideration, debate, thinking) |
| brainy(adjective, reasonable, keen, deep, rational) |
| brood |
| care(noun, thought, debate, discussion) |