List of head over heels in synonyms and head over heels in related words.
absorbed, absorbed in, buried in, caught up in, contemplating, contemplative, devoted, devoted to, engaged, engrossed, engrossed in, enmeshed in, entangled in, far-gone, immersed in, implicated in, intent, intent on, involved, involved in, lost in, meditating, meditative, monomaniacal, monopolized, obsessed, occupied, preoccupied, single-minded, studious, studying, submerged in, swept up, taken up with, tied up in, totally absorbed, wrapped in, wrapped up in