Heads-up and Wakeful

Heads-up adjective - Fully alert and watchful.

Wakeful and heads-up are semantically related. In some cases you can use "Wakeful" instead an adjective phrase "Heads-up".

Wakeful adjective - Not sleeping or able to sleep.

Heads-up and wakeful are semantically related. Sometimes you can use "Heads-up" instead an adjective "Wakeful".

Nearby Words: wake, waking, wakeless, waked