What is another word for "focus"?

Roget's Thesaurus (1911) lists these synonyms for "focus": air, alembic, andiron, area, athanor, axial, axis, azygous, backbone, backlog, bakehouse, bath, behind, blind, blush, boiler, born, brasier, bring, buoyancy, burner, caboose, caldron, camboose, center, central, centrality, centralization, centralize, centrally, centrical, chamber, coal, column, combustion, conceal, concealed, concealment, concentrate, concentration.