KEY: Occur.
SYN: Befall, happen, betide, supervene, take place, appear, arise.
ANT: Pass, threaten, impend.
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KEY: Occurrence.
SYN: Event, affair, incident, transaction, adventure, [See EVENT].
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KEY: Ocular.
SYN: Visible, demonstrable, palpable.
ANT: Inferential, auricular, hearsay, circumstantial, deductive, constructive.