immediate
instanter
tout de suite
at a moment's notice
offhand
in the blink of an eye
in the twinkling of an eye
at the drop of a hat
at once
off the bat
forthwith
off the rip
presently
at one stroke
incontinent
right now
on the nail
in the wink of an eye
instant
tatkal
out of the chute
instantaneously
most Rikki-Tik
in a flash
instantiable
right
right off
simultaneously
immediately
at the same time
this minute
insta-
then and there
straight out of the chute
fait accompli
all of a sudden
first thing
this instant
nowish
unhesitantly
stat
straightly
flash
right away
straight away
sudden
toot suite
immediacy
spontaneous
like a shot
shine
pseudoparticle
in a jiffy
in a snap
instantly
soonest
one-handed
as soon as look at someone
coinstantaneous
at full tilt
coinstantaneously
standing on one's head
suddenly
proximally
just yet
Lapalissian
like the wind
now-now
surpriseless
mile a minute
at the high port
on the spot
bouncy
like winkin
full pelt
mai tu liao
in no time
see with half an eye
prestissimo
autosensing
just like that
no time to lose
⠊⠍⠍
incidentless
unhasting
pronto
outright
hotfoot
flying start
running start
on sight
supersudden
painfully obvious
out of the blue
superevident
while we're young