everwatchful
ever-watchful
Argus-eyed
keep cave
on guard
on your guard
supervigilant
on one's guard
upon one's guard
watch and ward
vigilantly
watchfulness
weather eye
vigilance
wakeful
ward
vigilantness
unwinking
on watch
hypervigilant
waker
awatch
open-eyed
stand guard
watchful
vigilant
keep an eye open
wary
argus-eyed
keep a lookout
watcher
survey
follow
surveil
hypervigilantly
observative
keep one's stick on the ice
watchingness
look after
sketch
on the alert
heads-up
jealousy
look out
keep one's eyes skinned
keep one's eyes open
keep one's eyes peeled
invigilation
reckful
wariness