job

business, employ, employment, occupation, profession

work

office, spot

calling, pursuit, trade, vocation

line, racket

engagement, gig

livelihood, living

career, lifework, practice (also practise)

duty, mission, posting, service, task

endeavor, enterprise, project, stint, undertaking

care, charge, commission, responsibility

function, mission, office, operation, post

errand

circuit, round, route

burden, chore, duty, need, obligation, office, requirement, responsibility

errand, labor, work

commitment, pledge, promise

appointment, commission, designation, nomination

compulsion, constraint, restraint

affair, concern, hand, involvement, participation

niche, office, post, situation

calling, occupation, pursuit, vocation

activity, assignment, charge, commission, duty, employ, mission, responsibility, service, use

drudgery, grind, heavy lifting

effort, strain, sweat

burden, load, weight

bother, nuisance, trouble