RichThesaurus
extemporaneously
extemporaneously
synonyms
extempore
off the cuff
spontaneously
without rehearsal
impromptu
on the spur of the moment
without preparation
ad libitum
ad lib
off the top of one's head
just like that
at the drop of a hat
extemporarily
offhand
without consideration
on impulse
on the spot
without planning
ad-lib
without checking
off the top of one’s head
without being asked
impulsively
unpremeditatedly
of one's own accord
voluntarily
ex tempore
unawares
cold
involuntarily
unintentionally
expeditiously
instantaneously
carelessly
thoughtlessly
immediately
unknowingly
on the fly
unthinkingly
instinctively
characteristically
by accident
typically
intentionally
naturally
deliberately
natural
consciously
purposely
habitually
more synonyms
extemporaneously
antonyms
with preparation
written
from notes
prepared
rehearsed
planned
deliberately