affect, affection, arrhythmia, beat, beating, beloved, darling, drumming, emotion, emotional charge, emotional shade, experience, feeling, feeling tone, flame, flutter, foreboding, gut reaction, heartbeat, honey, impression, love, palpitation, passion, pitapat, pitter-patter, presentiment, profound sense, pulsation, pulse, rat-a-tat, rataplan, reaction, response, rhythm, sensation, sense, sentiment, staccato, throb, throbbing, turtledove, undercurrent

For further exploring for "heartthrob" in Webster Dictionary Online