SYN: Separate, apart, disunited, divided, in twain.
ANT: In one, close, united, together.
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KEY: Athletic.
SYN: Strong, vigorous, powerful, stalwart, brawny, muscular, ablebodied, lusty, sinewy, robust.
ANT: Weak, puny, effeminate, nerveless, strengthless, unbraced.
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KEY: Atom.
SYN: Molecule, particle, mote, speck, scrap, bit.
ANT: Mass, whole, aggregate, lump.