What is another word for "function"?

Roget's Thesaurus (1911) lists these synonyms for "function": act, acting, action, agency, arc, arcade, arch, arched, arcuation, bay, bear, bend, bending, bough, bought, bow, bring, cardioid, carve, catenary, causation, caustic, ceiling, come, concameration, conchoid, crane, crescent, crook, curl, curling, curvation, curvature, curve, curvity, deflection, deflexion, despair, detour, devexity.