RichThesaurus
off the top of head
off the top of head
synonyms
unstudied
impromptu
off the hip
extempore
off the cuff
informal
offhand
unprepared
spontaneous
unpremeditated
extemporary
plunging
unanticipated
rash
rapid
on impulse
tossed out
hasty
spur-of-themoment
heedless
thought out loud
without preparation
throwaway
unforeseen
ad lib
swift
violent
uncontrolled
ad hoc
improvised
refractory
immediate
reckless
winging it
on-the-spot
precipitant
unplanned
spur-of-the-moment
willful
subitaneous
taking for ride
rushing
tossed off
jump the gun
without warning
snap
quick
unexpected
automatic
unrehearsed
more synonyms
off the top of head
antonyms
planned
read
rehearsed
practiced
slow
prepared
written
careful
cautious