action
ad hoc
ad hoc measure
ad lib
ad libitum
ad-lib
ad-libbing
alternate
alternative
answer
arrangement
artifice
backup
band-aid
bung
check valve
cock
contrivance
cork
counterfeit
countermove
coup
course of action
demarche
dernier ressort
device
dodge
dummy
effort
emergency
equivalent
ersatz
expediency
expedient
extemporaneous
extemporaneousness
extemporariness
extemporary
extempore
extemporization
fake
faucet
gimmick
imitation
impromptu
improvisation
improvisational
improvisatorial
improvise
improvised
quick fix