| Monomania (n.) Obsession of the mind in regard of a single subject only; also, such a concentration of interest upon one particular subject or train of ideas to show mental derangement. Thesaurus Entries absorbed attention, absorption, application, complex, compulsion, concentration, contemplation, deep study, deep thought, engagement, engrossment, fascination, fixation, fixed idea, hang-up, hypercathexis, idee fixe, immersion, intentness, involvement, irresistible impulse, meditation, morbid drive, obsession, obsessive compulsion, possession, preoccupation, prepossession, profound thought, rapt attention, ruling passion, single-mindedness, studiousness, study, submersion, tic |