Word Study
tranquillity
CIDE DICTIONARY
tranquillity, n. [F. tranquillité, L. tranquillitas.].
The quality or state of being tranquil; calmness; composure. [1913 Webster]
THESAURUS
tranquillity
Buddha-like composure, Oriental calm, abnegation, abstinence, arrangement, array, ataraxia, ataraxy, awful silence, blank mind, blankmindedness, blankness, calm, calm disposition, calm of mind, calmness, comfort, composure, concord, conservatism, constraint, contemplation, continence, control, cool, coolheadedness, coolness, countenance, dead, dead of night, deathlike silence, deployment, dispassion, disposal, disposition, ease, easy mind, emptiness of mind, empty-headedness, evenness, fallow mind, fatuity, foolishness, formation, gentleness, golden mean, golden silence, happy medium, harmony, hush, hush of night, icy calm, impartiality, imperturbability, imperturbation, inactivity, inanity, inaudibility, indisturbance, judiciousness, juste-milieu, law and order, layout, lenity, lineup, lucid stillness, lull, marmoreal repose, marshaling, meden agan, mental blankness, mental composure, middle way, mildness, moderateness, moderation, moderationism, mum, neutrality, nirvana, noiselessness, nonviolence, nothing in excess, oblivion, order, orderliness, organization, pacifism, passivity, peace, peace and quiet, peace of mind, peacefulness, philosophic composure, philosophicalness, philosophy, placidity, placidness, proportion, prudence, quiescence, quiescency, quiet, quiet life, quiet mind, quietism, quietness, quietude, regularity, relaxation, repose, rest, restfulness, restraint, routine, sangfroid, satori, self-abnegation, self-control, self-denial, self-restraint, serenity, setup, silence, silentness, silken repose, sleep, slumber, sobriety, solemn silence, soothingness, soundlessness, stability, steadiness, still, stillness, structure, symmetry, system, tabula rasa, tacitness, taciturnity, temperance, temperateness, thoughtfreeness, thoughtlessness, tomblike silence, unbuttoned ease, unexcessiveness, unextravagance, unextremeness, uniformity, unintelligence, unruffledness, vacancy, vacuity, via media, whisht, wise passivenessFor further exploring for "tranquillity" in Webster Dictionary Online