extemporaneous
extemporaneously
off the top of one's head
seat-of-the-pants
intuitively
offhand
offhandedly
unconsidered
offhanded
extempore
ad-libbed
extemporarily
unpremeditated
sloppy-minded
ex tempore
ready-made
on the hoof
speculativism
impromptu
calculated
spontaneously
ad lib
deliberate
ad libitum
measured
mispreparation
blindly
promiscuous
ill-conceived
intuition
casual
unplanned
cold
misguided
off-the-cuff
ad-lib
unconscious
unrehearsed
extemporary
empirically
preparingly
unawares
unprepared
rough
foreprepare
in order
illogically
practicality
crude
predeliberate
casually
foretrained
methodless
analytical
currente calamo
unempirically
methodologically
mooncalf
all dressed up and nowhere to go
volitional
heuristic
macroplanning
overprepare
semirational
impracticality
improvise
staircase wit
proof of concept
procedural
pattern
off base
unpremeditatedly
unforethoughtful
model
chopped logic
play by ear
unmethodical
diversionary
misplan
preparatively
in fighting trim
planned
plotted
grammar
swim upstream
aforethought
premeditated
misprepare
standby