the fact or power of enduring or bearing pain, hardships, etc.

the ability or strength to continue or last, esp. despite fatigue, stress, or other adverse conditions; stamina

He has amazing physical endurance.

lasting quality; duration

His friendships have little endurance.

something endured, as a hardship; trial.

noun

end , fleetingness

noun

ability , allowance , backbone , bearing , capacity , continuing , cool , coolness , courage , enduring , forebearance , fortitude , grit , guts , gutsiness , heart * , holding up , intestinal fortitude , mettle , moxie * , patience , perseverance , persistence , pertinacity , pluck , resignation , resistance , resolution , restraint , spunk , stamina , standing , starch * , strength , submission , sufferance , suffering , tenacity , tolerance , toleration , undergoing , vitality , will , withstanding , continuance , continuation , durability , duration , immutability , longevity , permanence , stability , staying power , continuity , continuum , persistency , abidance , forbearance , hardihood , lastingness , vigor