| deep thought(noun, expression, study, profound) |
| fusion(noun, combination, amalgamation, integration, incorporation) |
| imbibing(noun, combination, amalgamation, incorporation, assimilation) |
| notice(noun, activity, concern, interest, attention) |
| pondering(noun, thought, consideration, thinking, detachment) |
| reflection(noun, study, thought, consideration, thinking) |
| taking in(noun, expression, use, combination, breakdown) |
| absence of mind(expression, idiom, inattention) |
| absorb |
| admission(noun, reception, consumption) |
| adsorption |
| amalgamation(noun, combination, integration, incorporation) |
| attentiveness(noun, activity, concern, mind, notice) |
| brooding(noun, thought) |
| captivation(noun, interest, attention, amusement, occupation) |
| care(noun, activity, concern, interest, notice) |
| castle-building(noun, fantasy, dream, thoughtfulness, vagueness) |
| centralization(noun, concern, combination, attention, vision) |
| cerebration(noun, thought, consideration, thinking) |
| close study(expression, study) |