absent, absentminded, absorbed, absorbed in, abstracted, assiduous, bemused, besotted, blind, buried in, buried in thought, castle-building, caught up in, constant, contemplating, contemplative, continuing, daydreaming, daydreamy, deaf, deep, devoted, devoted to, diligent, dogged, dreaming, dreamy, drowsing, ecstatic, elsewhere, enduring, engaged, engaged in thought, engrossed, engrossed in, engrossed in thought, faithful, faraway, fixated, forgetful, gripped, half-awake, held, hung-up, immersed, immersed in, immersed in thought, immutable, in a reverie, in the clouds, inalterable, indefatigable, indomitable, industrious, infatuated, insensible, insistent, intent, intent on, introspective, invincible, involved, lasting, lost, lost in, lost in thought, loyal, meditating, meditative, monomaniac, monomaniacal, monopolized, mooning, moonraking, museful, musing, napping, never-tiring, nodding, oblivious, obsessed, obstinate, occupied, patient, patient as Job, pensive, permanent, perseverant, persevering, persistent, persisting, pertinacious, pipe-dreaming, plodding, plugging, possessed, prepossessed, rapt, relentless, resolute, sedulous, single-minded, sleepless, slogging, somewhere else, stable, stargazing, steadfast, steady, stubborn, studious, studying, submerged in, swept up, taken up, taken up with, tenacious, tireless, totally absorbed, transported, unabating, unconquerable, unconscious, undaunted, undiscouraged, undrooping, unfailing, unfaltering, unflagging, unflinching, unintermitting, uninterrupted, unnodding, unrelaxing, unrelenting, unremitting, unsleeping, unswerving, untiring, unwavering, unwearied, unwearying, unwinking, utterly attentive, weariless, woolgathering, wrapped, wrapped in, wrapped in thought, wrapped up, wrapped up in