SYN: Decline, decay, expenditure, waste, decrement, lessening, decrease.
ANT: Growth, development, enlargement, augmentation.
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KEY: Contact.
SYN: Touch, contiguity, continuity, apposition, adjunction.
ANT: Proximity, adjacence, interruption, disconnection, separation, distance, isolation, noncontact.
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KEY: Contagious.
SYN: Catching, epidemic, infectious, pestilential, communicated, transferred, transmitted, infections.
ANT: Sporadic, endemic, preventive, antipathetic.