ad lib
off-the-cuff
spur-of-the-moment
extemporarily
extemporally
ad hoc
extemporary
improvisation
on the hop
unwittingly
just
fortuitously
semispontaneous
adventitious
eccentrically
flashing
flash
immemorably
semioccasional
semioccasionally
as an aside
semistaged
enigmatically
mythological
one day
belatedly
taste
subtransverse
mis-
improvidentially
unforeseenly
freakish
bizarre
outlandish
eccentric
short
far-out
off-the-wall
find oneself
immemorially
flakey
flaky
outre
gonzo
one
antecedaneously
moment
momentously
freaky
quirky
offbeat
preoccurrence
hot minute
apropos
agonizedly
temporally
way-out
crabwise
parenthetically
run into
kinky
days
unfamiliarly
curiously
by the by
transiently
suppositious
fleetingly
accidentally
circumstantial
semidramatic
semi-jocular
way out
bam
brush
premeditatingly
prepensely
improvidently
agonistically
premeditatedly
sharp
purposed
recentish
expostulatively
evanescent
precipitously
lippening
earlier on
tectonic
out of nowhere
retro-
midthought
inopportune
impertinence
yestertide
adventitiously
ad lib
off-the-cuff
spur-of-the-moment
ad hoc
extemporary
semispontaneous
adventitious
semioccasional
semistaged
mythological
subtransverse
freakish
bizarre
outlandish
eccentric
far-out
off-the-wall
flakey
flaky
outre
gonzo
one
freaky
quirky
offbeat
preoccurrence
apropos
way-out
crabwise
kinky
by the by
suppositious
circumstantial
semidramatic
semi-jocular
way out
sharp
purposed
recentish
evanescent
lippening
tectonic
inopportune
extemporarily
extemporally
ad lib
unwittingly
just
fortuitously
eccentrically
immemorably
semioccasionally
as an aside
enigmatically
one day
belatedly
improvidentially
unforeseenly
short
immemorially
antecedaneously
momentously
agonizedly
temporally
parenthetically
unfamiliarly
curiously
transiently
fleetingly
accidentally
premeditatingly
prepensely
improvidently
agonistically
premeditatedly
expostulatively
precipitously
earlier on
yestertide
adventitiously
improvisation
flashing
flash
taste
moment
hot minute
days
brush
midthought
impertinence
find oneself
run into
English words for 'Extemporaneous, impromptu.'
As you may have noticed, above you will find words for "Extemporaneous, impromptu.". Hover the mouse over the word you'd like to know more about to view its definition. Click 
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unreasonable.
means of living
fractional distillation
maglev train
to grumble.
conceivable.
Kanto
rough surface
Jesus Christ.
gavel
alopecia areata
but.
tensile strength
Mongoloid race
Having a similar appearance or seeming identical
mason wasps
calcaneus
spotlight
infallible
barite.
sharp fall
internal conflict
Not royal
to knock around
crisply
reappearance
executive secretary
greetings
acknowledge
sports club
poor health
printing type
unseasonable
baby face
to sort
apart from that
to cast.
to purge.
pagoda
courageous.
ferry
telecommuting
flunky
ash
to hold on to
compassionate
human
intelligence
preparation
secret