Synonyms and related words :
accidia, acedia, aloofness, apathy, ataraxia, benumbedness, blah, blahs, bovinity, calmness, carelessness, casualness, comatoseness, composure, contemplation, coolness, detachment, disinterest, dispassion, dispassionateness, disregard, disregardfulness, dullness, easy temper, easygoingness, even temper, good temper, heartlessness, hebetude, heedlessness, hopelessness, impassiveness, impassivity, imperturbability, imperturbableness, inappetence, inattention, incuriosity, indifference, indiscrimination, inexcitability, inexcitableness, inirritability, insouciance, lack of affect, lack of appetite, lackadaisicalness, languidness, lethargicalness, lethargy, listlessness, lucid stillness, marmoreal repose, mindlessness, negligence, nirvana, nonchalance, numbness, passiveness, passivity, patience, peace, peacefulness, phlegm, phlegmaticalness, phlegmaticness, placidity, placidness, plucklessness, pococurantism, quiescence, quiescency, quiet, quietism, quietness, quietude, recklessness, regardlessness, repose, resignation, resignedness, rest, restfulness, sangfroid, satori, serenity, silence, silken repose, sleep, sloth, sluggishness, slumber, smooth temper, sopor, soporifousness, spiritlessness, spunklessness, steadiness, stillness, stoicism, stolidity, stupefaction, stupor, supineness, torpidity, torpidness, torpor, tranquillity, unanxiousness, unconcern, unirritableness, unmindfulness, unnervousness, unpassionateness, unsolicitousness, wise passiveness, withdrawnness