KEY: Musty.
SYN: Fusty, rank, mouldy, frowzy, stale, sour, fetid, mildewed.
ANT: Fragrant, fresh, balmy, aromatic, odorous.
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KEY: Mutable.
SYN: Changeable, changeful, mobile, transient, ephemeral, inconstant, unsteadfast, fickle, fitful, undecided, restless.
ANT: Unchanging, permanent, immutable, persistent, changeless, Mutation, [See VARIATION].
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KEY: Mute.
SYN: Silent, speechless, dumb, taciturn, voiceless, still, death-like.