KEY: Rusticity.
SYN: Rudeness, clownishness, boorishness, coarseness, simplicity, artlessness.
ANT: Courtliness, refinement, polish, gentility, urbanity.
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KEY: Rustle.
SYN: Quiver, whisper, susurration, murmur, sighing.
ANT: Hubbub, blast, din, racket, crashing.
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KEY: Ruthless.
SYN: Unpitying, unrelenting, truculent, unsparing.