Synonyms: 37
impromptu
informal
off-the-cuff
unprepared
extemporary
off-the-record
spontaneous
off-the-top-of-one-s-head
unstudied
unrehearsed
improvised
ad-lib
extempore
snap
spur-of-the-moment
abrupt
autoschediastic
careless
casual
cavalier
chance
curt
hasty
improvisatorial
improvisatory
improviso
impulsive
unceremonious
unconventional
unplanned
unpremeditated
autoschediasm
improvisation
offhanded
offhandedly
at-the-moment
by-ear
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