RichThesaurus
be up on
be up on
synonyms
solicitous
knowledgeable
alert
on to
regardful
observative
conscious
watchful
cautious
vigilant
conscientious
know ins and outs
knowing
on the ball
heedful
with eyes peeled
cognizant
know all the answers
chary
conversant
thoughtful
sensible
observing
observant
cagey
in the know
on the job
alive to
respectful
au courant
wary
on one’s toes
plugged in
tuned in
careful
mindful
apprehensive
be up on
antonyms
inattentive
unaware
careless
heedless
absent-minded