- a brisk walk in the park.
- a lively gait.
- a merry chase.
- a snappy pace.
- a spanking breeze.
- alert enough to spot the opportunity when it came.
- alert to the problems.
- alive to what is going on.
- an alert mind.
- awake to the dangers of her situation.
- bombers were put on alert during the crisis.
- caught by a couple of alert cops.
- constantly alert and vigilant, like a sentinel on duty.
- The empty house alarmed him.
- traveling at a rattling rate.
- was now awake to the reality of his predicament.
- We alerted the new neighbors to the high rate of burglaries.