vigilant
- adjective (adj)
Meaning: careful, watchful
Synonyms:
acute
agog
alert
anxious
attentive
aware
cautious
circumspect
guarded
keen
looking for
looking to
observant
on alert
on guard
on the ball
on the job
on the lookout
on the qui vive
on toes
open-eyed
sharp
sleepless
unsleeping
waiting on
wakeful
wary
wide-awake
with eyes peeled
with weather eye open
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.