array, articulation, bank, buzz, catena, catenation, chain, chain reaction, chaining, concatenation, connection, consecution, continuum, course, cycle, descent, drone, endless belt, endless round, file, filiation, gamut, gradation, hum, line, lineage, monotone, nexus, pendulum, periodicity, plenum, powder train, progression, queue, range, rank, recurrence, reticulation, rotation, round, routine, row, run, scale, sequence, series, single file, spectrum, string, succession, swath, thread, tier, train, windrow