AC, AF, CPS, DC, EHF, HF, Hz, Indian file, Kekule formula, MF, O, Platonic year, RF, SHF, UHF, VHF, VLF, absorption current, active current, aeon, age, alternate, alternating current, ambit, annular muscle, annulus, annus magnus, areola, array, arsis, articulation, atomic cluster, audio frequency, aureole, bank, be here again, beat, benzene ring, bicycle-built-for-two, bicycle, bike, bout, branched chain, bus, buzz, carrier frequency, catch a train, catena, catenation, chain, chain reaction, chaining, chaplet, chauffeur, chopper, circle, circuit, circuiteer, circulate, circumambulate, circumference, circummigrate, circumnavigate, circumvent, circus, close the circle, closed chain, closed circle, come again, come and go, come around, come full circle, come round, come round again, come up again, compass, compound radical, concatenation, conduction current, connection, consecution, continuum, convection current, corona, coronet, course, crown, cycle of indiction, cycles, date, day, delta current, descent, describe a circle, diadem, diastole, dielectric displacement current, direct current, discus, disk, displacement current, downbeat, drive, drone, eddy current, electric current, electric stream, emission current, encircle, encompass, endless belt, endless round, entrain, eternal return, exciting current, extremely high frequency, fairy ring, file, filiation, flank, free alternating current, frequency, frequency spectrum, full circle, galvanic current, gamut, garland, generation, girdle, girdle the globe, glory, go about, go around, go by rail, go round, go the round, gradation, great year, gyre, halo, hertz, heterocycle, high-frequency current, high frequency, homocycle, hum, idle current, indiction, induced current, induction current, intermediate frequency, intermit, ionization current, iron, joyride, juice, kilocycles, kilohertz, lap, lasso, lattice, line, lineage, logical circle, loop, looplet, low-frequency current, low frequency, lower frequencies, magic circle, magnetizing current, make a circuit, make a train, medium frequency, megacycles, megahertz, minibike, molecule, monocycle, monotone, motocycle, motor, motorbike, motorcycle, multiphase current, nexus, noose, orbit, oscillate, pattern, pedal, pedicab, pendulum, periodicity, pig, plenum, powder train, progression, pulsate, pulsating direct current, pulse, queue, radical, radio frequency, radius, range, rank, reactive current, reappear, recur, recurrence, recycle, reoccur, repeat, reticulation, return, revolution, revolve, ride, ring, road-bike, roll around, rondelle, rotary current, rotate, rotation, round, round trip, roundel, rounds, routine, row, run, saucer, scale, scooter, sequel, sequence, series, side chain, sidewalk bike, simple radical, single-phase alternating current, single file, skirt, space-lattice, spark frequency, spectrum, spell, sphincter, spiral, straight chain, stray current, string, succession, superhigh frequency, surround, swath, systole, take a joyride, tandem, taxi, thermionic current, thermoelectric current, thesis, thread, three-phase alternating current, tier, time, tour, trail bike, train, tricycle, trike, turn, two-wheeler, ultrahigh frequency, undulate, upbeat, upper frequencies, velocipede, very high frequency, very low frequency, vicious circle, voltaic current, walk, watt current, wheel, wheel around, windrow, wreath