What is another word for "discontent"?

Roget's Thesaurus (1911) lists these synonyms for "discontent": accusation, aching, again, alas, and, bad, behind, bewail, bitterness, cast, day, deplore, hang, have, heartburning, homesick, lament, lamentable, lamentation, laudator, leave, lingering, longing, look, mind, most, much, nostalgia, penitence, pity, prey, recrimination, regret, regretful, repent, repine, rue, sorry, the, too.