Monotone1. (n.) A single unvaried tone or sound; a person who speaks in a single tone.
2. (n.) The utterance of successive syllables, words, or sentences, on one unvaried key or line of pitch.
Thesaurus Entries
AF, Indian file, alliterating, alliteration, alliterative, array, articulation, assonance, assonant, audio frequency, banausic, bank, belabored, blah, buzz, catena, catenation, chain, chain reaction, chaining, chanting, chime, chiming, cliche-ridden, clockwork regularity, concatenation, connection, consecution, constancy, continuum, course, cycle, daily round, descent, dim, dingdong, dreary, drone, droning, endless belt, endless round, even pace, even tenor, file, filiation, frequency, fundamental, fundamental tone, gamut, gradation, harmonic, harping, hum, humdrum, intonation, invariability, jingle, jingle-jangle, jog-trot, labored, line, lineage, monologue, monotonic, monotonous, monotonousness, monotony, near rhyme, nexus, orderliness, overtone, partial, partial tone, pedestrian, pendulum, periodicity, pitch, pitter-patter, plenum, poky, powder train, progression, queue, range, rank, recurrence, regularity, repeated sounds, repetitiousness, repetitiveness, reticulation, rhyme, rhymed, rhyming, rotation, round, routine, row, run, sameliness, sameness, scale, sequence, series, single file, singsong, slant rhyme, smoothness, soniferous, sonorous, sounded, sounding, spectrum, stale repetition, stodgy, string, succession, swath, tedious, tedium, thread, tier, tonal, tone, toneless, tonelessness, train, treadmill, trot, undeviation, undifferentiation, unnecessary repetition, unvariation, windrow