efficient
agile
alacritous
alert
apt
breakneck
brisk
cursory
dashing
decisive
diligent
dispatchful
double-quick
eagle-winged
effective
effectual
efficacious
express
fast
festinate
feverish
fleet
flying
furious
galloping
hair-trigger
hasty
headlong
hurried
hustling
immediate
instant
instantaneous
last-minute
light of heel
light-footed
lively
mercurial
nimble
nimble-footed
on the spot
passing
precipitate
prompt
punctual
quick
quick as lightning
expedite
expeditiously
businesslike
circuitous
commodious
cost-effective
dependable
easy-to-use
economical
equitable
feasible
inexpensive
methodical
painless
precautionary
readiest
satisfactory
southward
speediest
speedy
straightforward
uneventful
Delicious
ambitious
auspicious
capricious
delicious
factitious
fictitious
injudicious
judicious
malicious
nutritious
pernicious
propitious
repetitious
seditious
superstitious
surreptitious
suspicious
vicious