erect
watchfully
lidless
sleepless
bird dog
vigilantly
keep one's eyes skinned
keep one's eyes open
keep one's eyes peeled
observative
watchably
stand sentinel
observe
await
observant
watchability
all eyes
heads-up
wide-awake
excubant
nark
khabardaar
overwatch
vigilance
overlook
have eyes on
watchingness
watch and wait
tune in
seethingly
guard
have one's eye on
take heed
regardant
watch
bewatch
waker
keep an eye out
awatch
watchingly
take care
keep one's head on a swivel
aseethe
clap eyes on
take in
guarded
keep an eye peeled
see
watchable
catch