unisonance

noun

unis·​o·​nance

-nən(t)s

plural unisonances

: a blending of sound

The first two sounds reach the ear as a unisonance—the booming impact of the tons of water and the wild roar of the up-rush blending—and this mingled sound dissolves into the foam-bubble hissing of the third.

—Henry Beston, The Outermost House, 1928

especially : unison

Word History

Etymology

unison entry 2 + -ance

First Known Use

1721, in the meaning defined above

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