Rapidly synonyms such as at (full) speed, a mile a minute, and abruptly. Rapidly is an adverb, and its antonyms are slowly and gradually. Additionally, here are 49 synonyms and nearby words for rapidly as well as words beginning with R, Ra, Rap, Rapi, and Rapid.
49 synonyms for rapidly
a mile a minute
abruptly
apace
at (full) speed
at a gallop
at a rate of knots
at full tilt
at the double
at the speed of light
at warp speed
before one can say knife
briskly
double quick
expeditiously
fast and furious
hastily
hell for leather
hotfoot
hurriedly
in a flash
in a hurry
in a rush
in haste
lickety-split
like (greased) lightning
like a bat out of hell
like a bomb
like a madman/madwoman
like a scalded cat
like a shot
like a streak
like billy-o
like blazes
like mad
like nobody's business
like the clappers
like the deuce
like the wind
p.d.q. (pretty damn quick)
post-haste
precipitately
promptly
pronto
speedily
swiftly