hear the grass grow
clock
goam
have an eye for
tell
observe
make out
pick up on
advert
sharp-eyed
take note
attentive
pick up
espy
attend to
pree
spot
pay heed
deprehend
mark
watch it
attentiveness
rivet
give heed
resolution
scratch beneath the surface
pore
focus
concentrate
behold
centre
perceptive
center
-spect
snilch
remark
turn to
appreciate
eye
note
circumspect
attendingly
twig
tune in
take heed
notice
onlook
follow
observance
meticulous
pay attention
observation
perspicaciousness
make a point
refer
awake
i-dotter
intentive
watch like a hawk
t-crosser
commentator
sensibly
peering
observer
mindful
put two and two together
know one's ass from a hole in the ground
spotlight
have someone's ear
foreread
mind
indicate
take account
scrutator
cogniscient
get it
underlook
zoom in
point
polyattentive
perceptiveness
have eyes in the back of one's head
misinspect
downy
watch
enlighten
skill
bet
noticing
have designs on
gongoozle