RichThesaurus
quick off the mark
quick off the mark
synonyms
sharp
quick-witted
on the ball
perceptive
bright
quick
astute
quick on the uptake
clever
smart
alert
intelligent
acute
sharp-witted
whip-smart
on one's toes
wide awake
shrewd
perspicacious
discerning
brilliant
penetrating
brainy
agile
piercing
intuitive
argute
genius
keen
incisive
insightful
suss
long-headed
ready
heads-up
observant
nimble
savvy
judicious
sapient
rapierlike
with it
sagacious
razor-sharp
responsive
canny
streetwise
wise
gifted
all there
more synonyms
quick off the mark
antonyms
slow
stupid
dull
slow-witted
slow off the mark
thick
obtuse
dim-witted
dense
dozy
dim