Heartfelt synonyms such as cordial, ardent, and bona fide. Heartfelt is an adjective, and its antonyms are insincere and apathetic. Additionally, here are 21 synonyms, related words, and verbs for heartfelt.
ardent, bona fide, cordial, deep, deeply felt, eager, earnest, enthusiastic, fervent, from the heart, full-hearted, genuine, honest, kindly, passionate, profound, sincere, unfeigned, warm, and wholehearted.