Axis and Zero hour

Axis noun - A thing or place that is of greatest importance to an activity or interest.

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

Nearby Word: axial

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

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