Occasion and Zero hour

Occasion noun - A particular point at which an event takes place.

Zero hour and occasion are semantically related. In some cases you can use "Zero hour" instead a noun "Occasion".

Nearby Words: occasional, occasionally, occasioned, occasioning, occasionalism

Zero hour noun - A time or state of affairs requiring prompt or decisive action.

Occasion and zero hour are semantically related. Sometimes you can use "Occasion" instead a noun phrase "Zero hour".