KEY: Multiplication.
SYN: Multiplicity, plurality, multitudinousness, multifariousness, multitude, repetition, reiter ation, reproduction, augmentation, swarming, teeming.
ANT: Singularity, unity, scantiness, rarity, diminution, extinction.
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KEY: Multisonous.
SYN: Many-voiced, tuneful.
ANT: Unisonous, droning, monotonous.
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KEY: Multitude.
SYN: Crowd, swarm, accumulation, throng, concourse, number, host, mob, rabble.