Synonyms and related words :
acceptance, ataraxia, ataraxy, austerity, backbone, bovinity, calm, calmness, coolness, dispassion, dispassionateness, dullness, easy temper, endurance, even temper, fatalism, forbearance, forbearing, forbearingness, fortitude, good temper, grit, guts, impassiveness, impassivity, imperturbability, imperturbableness, indifference, indulgence, inexcitability, inexcitableness, inirritability, insensibility, lenience, leniency, long-sufferance, long-suffering, longanimity, patience, patience of Job, patientness, perseverance, phlegm, pluck, resignation, sand, self-control, self-possession, smooth temper, steadiness, stolidity, sufferance, sweet reasonableness, tolerance, toleration, unirritableness, unnervousness, unpassionateness, unresponsiveness, waiting game, waiting it out