Countdown and Walk-up

Countdown noun - Counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle).

Walk-up and countdown are semantically related In some cases you can use "Walk-up" instead a noun "Countdown".

Nearby Words: count, counting

Walk-up noun - An apartment building without an elevator.

Countdown and walk-up are semantically related in short preliminary event topic. Sometimes you can use "Countdown" instead a noun phrase "Walk-up".