The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes.

Roget 312: rotation, revolution, spinning, gyration, turning about an axis, turning aound an axis, circulation, roll; circumrotation^†, circumvolution, circumgyration^†; volutation^†, circination^†, turbination^†, pirouette, convolution.    verticity^†, whir, whirl, eddy, vortex, whirlpool, gurge^†; countercurrent; Maelstrom, Charybdis; Ixion.    [rotating air] cyclone; tornado, whirlwind; dust devil.    [rotation of an automobile] spin-out.    axis, axis of rotation, swivel, pivot, pivot point; axle, spindle, pin, hinge, pole, arbor, bobbin, mandrel; axle shaft; gymbal; hub, hub of rotation.    [rotation and translation together] helix, helical motion.    [measure of rotation] angular momentum, angular velocity; revolutions per minute, RPM.    [result of rotation] centrifugal force; surge; vertigo, dizzy round; coriolus force.    [things that go around] carousel, merry-go-round; Ferris wheel; top, dreidel^†, teetotum; gyroscope; turntable, lazy suzan; screw, whirligig, rollingstone^†, water wheel, windmill; wheel, pulley wheel, roulette wheel, potter's wheel, pinwheel, gear; roller; flywheel; jack; caster; centrifuge, ultracentrifuge, bench centrifuge, refrigerated centrifuge, gas centrifuge, microfuge; drill, augur, oil rig; wagon wheel, wheel, tire, tyre [Brit.].    [Science of rotary motion] trochilics^†.    [person who rotates] whirling dervish.    ... show more

Roget 250: convexity, prominence, projection, swelling, gibbosity^†, bilge, bulge, protuberance, protrusion; camber, cahot [U.S.].    thank-ye-ma'am [U.S.].    swell.    intumescence; tumour [Brit.], tumor; tubercle, tuberosity [Anat.]; excrescence; hump, hunch, bunch.    boss, embossment, hub, hubble; [convex body parts] tooth [U.S.], knob, elbow, process, apophysis^†, condyle, bulb, node, nodule, nodosity^†, tongue, dorsum, bump, clump; sugar loaf etc. (sharpness) 253; bow; mamelon^†; molar; belly, corporation^†, pot belly, gut [Coll.]; withers, back, shoulder, lip, flange.    [convexities on skin] pimple, zit [Slang]; wen, wheel, papula [Med.], pustule, pock, proud flesh, growth, sarcoma, caruncle^†, corn, wart, pappiloma, furuncle, polypus^†, fungus, fungosity^†, exostosis^†, bleb, blister, blain^†; boil etc. (disease) 655; airbubble^†, blob, papule, verruca.    [convex body parts on chest] papilla, nipple, teat, tit [Vulg.], titty [Vulg.], boob [Vulg.], knocker [Vulg.], pap, breast, dug, mammilla^†.    [prominent convexity on the face] proboscis, nose, neb, beak, snout, nozzle, schnoz [Coll.].    peg, button, stud, ridge, rib, jutty, trunnion, snag.    cupola, dome, arch, balcony, eaves; pilaster.    relief, relievo [It], cameo; bassorilievo^†, mezzorilevo^†, altorivievo; low relief, bas relief [Fr.], high relief.    hill etc. (height) 206; cape, promontory, mull; forehead, foreland^†; point of land, mole, jetty, hummock, ledge, spur; naze^†, ness.    ... show more

Roget 247: circularity, roundness; rotundity etc. 249.    circle, circlet, ring, areola, hoop, roundlet^†, annulus, annulet^†, bracelet, armlet; ringlet; eye, loop, wheel; cycle, orb, orbit, rundle, zone, belt, cordon, band; contrate wheel^†, crown wheel; hub; nave; sash, girdle, cestus^†, cincture, baldric, fillet, fascia, wreath, garland; crown, corona, coronet, chaplet, snood, necklace, collar; noose, lasso, lassoo^†.    ellipse, oval, ovule; ellipsoid, cycloid; epicycloid [Geom.], epicycle; semicircle; quadrant, sextant, sector.    sphere etc. 249.    ... show more

Dutch: draaischijf, centrum, naaf

A center of activity or interest or commerce or transportation; a focal point around which events revolve.

Dutch: knooppunt, een kikker in de keel hebben, hub