THESAURUS
rue
affliction, anguish, be sorry for, bemoan, bewail, care, commiseration, compassion, compunction, contriteness, contrition, deplore, dole, grief, heartache, heartbreak, penance, penitently, regret, remorse, remorsefulness, repent, repentance, repine,
rue the day, ruth, sympathy, woe
ROGET THESAURUS
rue
Regret
VB
regret, deplore, bewail, repine, cast a longing lingering look behind,
rue,
rue the day, repent, infandum renovare dolorem, prey on the mind, weigh on the mind, have a weight on the mind, leave an aching void.
Penitence
VB
repent, be sorry for, be penitent,
rue, regret, think better of, recant, knock under, plead guilty, sing miserere, sing de profundis, cry peccavi, own oneself in the wrong, acknowledge, confess, (disclose), humble oneself, beg pardon, turn over a new leaf, put on the new man, turn from sin, reclaim, repent in sackcloth and ashes, (do penance), learn by experience.
Unsavoriness
N
unsavoriness, amaritude, acrimony, acridity (bitterness), roughness, acerbity, austerity, gall and wormwood,
rue, quassia, aloes, marah, sickener, unsavory, unpalatable, unsweetened, unsweet, ill-flavored, bitter, bitter as gall, acrid, acrimonious, rough, offensive, repulsive, nasty, sickening, nauseous, loathsome, fulsome, unpleasant.