on the spot Synonyms
at once
right now
by ear
unpremeditated
improv
in a pickle
on the dot
on-site
on hand
on the fly
on the ground
as soon as possible
as quickly as possible
on board
ad hoc
ad lib
asap
at first glance
right away
straight off
straightaway
New York minute
without hesitation
on the instant
pronto
that very minute
that minute
pretty damn quick
winging it
on the hot seat
on this spot
in this direction
taking for ride
thought out loud
tossed out
that instant
in double quick time
straight away
right off
then and there
there and then
this minute
toot sweet
without further ado
without delay
with all speed
as fast as possible
tossed off
abrupt
hereabouts