Synonyms of regret

1 Syllable
mourn, mourns, ning, guilt, mope, grief, ruth, dole, cried, woe, care, qualms, qualm, pang, ned
2 Syllables
grieved, bemoans, mourned, moped, demur, grieving, bewails, sorrow, heartbreak, scruple, moping, repent, bemoan, bewail, anguish, worry, concern, teardrop, lament, grumped
3 Syllables
affliction, bemoaned, misgiving, conscience, nostalgia, compunction, bitterness, refusing, discomfort, repented, repenting, bewailing, heartache, disliking, mislike, sorrowed, bewailed, contrition, repine, heartsickness, remorse, disliked, annoyance, lamented, ruefulness, bemoaning, self-disgust, self-reproach, discontent, sorrowing, repining
4 Syllables
apology, uneasiness, querulousness, malcontentment, apologies, lamentation, unfulfillment, disappointment, repentance, disenchantment, regretfulness, self-punishment, contriteness, penitence
5 Syllables
dissatisfaction, dissatisfactions, antipathize, self-accusation, self-condemnation, self-castigation, remorsefulness