Halfhearted rhymes with:
lighthearted, wholehearted, lighthearted, wholehearted, aborted, assorted, carted, courted, darted, escorted, exhorted, extorted, fainthearted, imparted, imported, lighthearted, misreported, ported, purported, resorted, restarted, retorted, shorted, snorted, sorted, sported, uncharted, underreported, unreported, unsupported, wholehearted
Halfhearted sounds like:
halbert, halferty, halford, halfrida, hallford, halpert, helbert, hilbert, hilpert, holbert, holford, hulbard, hulbert, hulburd, hulburt