deep thought

33 Moby Thesaurus words for "deep thought":
      absorbed attention, absorption, abstraction, application,
      brown study, close study, concentration, contemplation,
      contemplativeness, deep study, engagement, engrossment, immersion,
      intentness, involvement, meditation, melancholy, monomania, musing,
      obsession, pensiveness, preoccupation, profound thought,
      rapt attention, reflectiveness, reverie, single-mindedness,
      speculativeness, studiousness, study, submersion, thoughtfulness,
      wistfulness