Similar word to task:
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assignment, bother, burden, business, calling, charge, daily grind, deadweight, duty, effort, employment, enterprise, errand, exercise, fun and games, function, gig, grind, grindstone, headache, labor, load, long row to hoe, millstone, mission, nuisance, occupation, office, onus, pain, project, province, responsibility, stint, strain, tax, toil, trouble, undertaking, vocation, work