ANT: Verify, identify, recognize, authenticate.
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KEY: Collateral.
SYN: Indirect, related, connected, parallel.
ANT: Direct, linear, essential, integral.
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KEY: Colleague.
SYN: Helper, companion, associate, ally, confederate, coadjutor, partner, assistant, adjutant, assessor.
ANT: co-opponent, corival, counteragent, co-antagonist, competitor, colluctator.
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