adductor, approach, asymptote, attractant, attrahent, axiom, blurred, blurry, bottleneck, bring into focus
, center, center of attraction, center of consciousness, center of interest, clear, collision course, concenter, concentralization, concentralize, concentrate, concentration, concourse, concurrence, confluence, conflux, congress, converge, convergence, converging, core, crossing, cynosure, distinct, elixir, essence, essential, fix, fixate, flower, focal point, focalization, focalize, focus
of attention, fundamental, funnel, fuzzy, gist, gravamen, heart, hub, hypostasis, in focus
, indistinct, inner essence, kernel, lodestar, lure, magnet, marrow, meat, meet, meeting, mutual approach, narrowing gap, nave, nerve, nub, nucleus, nuts and bolts, out of focus
, pinpoint, pith, point of convergence, polestar, postulate, prime focus
, principle, put, quid, quiddity, quintessence, radius, rivet, sap, soul, spirit, spokes, spotlight, stuff, substance, tangent, target, the nitty-gritty, unclear, woolly, zero in
, point of convergence, corradiation, center, gathering place, resort haunt retreat, venue, rendezvous, rallying point, headquarters, home, club, depot, trysting place, place of meeting, place of resort, place of assignation, point de reunion, issue.
centrality, centricalness, center, middle, focus
, core, kernel, nucleus, nucleolus, heart, pole axis, bull's eye, nave, navel, umbilicus, backbone, marrow, pith, vertebra, vertebral column, hotbed, concentration, centralization, symmetry, center of gravity, center of pressure, center of percussion, center of oscillation, center of buoyancy, metacenter, central, centrical, middle, azygous, axial, focal, umbilical, concentric, middlemost, rachidian, spinal, vertebral, middle, midst, centrally.
furnace, stove, kiln, oven, cracker, hearth, focus
, combustion chamber, athanor, hypocaust, reverberatory, volcano, forge, fiery furnace, limekiln, Dutch oven, tuyere, brasier, salamander, heater, warming pan, boiler, caldron, seething caldron, pot, urn, kettle, chafing-dish, retort, crucible, alembic, still, waffle irons, muffle furnace, induction furnace, electric heater, electric furnace, electric resistance heat, open-hearth furnace, fireplace, gas fireplace, coal fire, wood fire, fire-dog, fire- irons, grate, range, kitchener, caboose, camboose, poker, tongs, shovel, ashpan, hob, trivet, andiron, gridiron, ashdrop, frying-pan, stew-pan, backlog, hearth, inglenook, oil burner, gas burner, Franklin stove, pot-bellied stove, wood-burning stove, central heating, steam heat, hot water heat, gas heat, forced hot air, electric heat, heat pump, solar heat, convective heat, hothouse, bakehouse, washhouse, laundry, conservatory, sudatory, Turkish bath, Russian bath, vapor bath, steam bath, sauna, warm bath, vaporarium.