Heads-up and Pick up on

Heads-up noun - The act or an instance of telling beforehand of danger or risk.

Pick up on and heads-up are semantically related. In some cases you can use "Pick up on" instead a verb phrase "Heads-up".

Heads-up and pick up on are semantically related. Sometimes you can replace phrase "Heads-up" with "Pick up on", this terms are similar.