RichThesaurus
at breakneck speed
at breakneck speed
synonyms
like the clappers
at full tilt
like a bat out of hell
like the wind
hell for leather
like billy-o
like a bomb
at a rate of knots
apace
posthaste
like mad
like crazy
as fast as one's legs can carry one
as fast as possible
lickety-split
on the double
at full speed
double quick
hotfoot
at the speed of light
like a scalded cat
like blazes
briskly
at a gallop
at a lick
like the deuce
like an arrow from a bow
like nobody's business
at warp speed
like (greased) lightning
speedily
fast
swiftly
at high speed
nippily
p.d.q. (pretty damn quick)
rapidly
a mile a minute
flat out
with all possible haste
in double quick time
like a whirlwind
with all speed
expeditiously
at full pelt
hurriedly
like greased lightning
quickly
madly
pell-mell
more synonyms
at breakneck speed
antonyms
slowly
moderately
at moderate speed