The crew has to work at breakneck speed to make repairs and adjustments to the racing car.
Synonyms and examplesfastHe drives too fast for my liking.
quicklyThe problem needs to be solved as quickly as possible.
swiftlyHe left and returned swiftly.
brisklyWe walked briskly through the park.
precipitouslyShare prices dropped precipitously on the economic news.
apaceformal or literaryThe building went on apace.
in a flashinformalI'll be back in a flash.
in the twinkling of an eyeold-fashionedThose little ones grow into adults in the twinkling of an eye.
Go to the thesaurus article about these synonyms and antonyms ofat breakneck speed.
See alsoquick
prompt
speedy
swift
hasty
hurried
brisk
rapid
expeditiousformal
high-speed
speed
race
fly
beltUKinformal
tearinformal
streak
hurtle
career
careenmainlyUS
bolt
shoot
spring
dive
jump
hurry
rush
dash
hotfoot itinformal
stride
march
charge
sail
like the clappersUKold-fashionedold-fashioned
go hell for leatherold-fashionedold-fashioned
speed up
pick up speed
gain speed
gather speed
accelerate
up the paceinformal
expediteformal
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If someone or something moves at a high speed or happens in a short amount of time, you can call that person or thingfast. Things that happen or are doneat a fast speedare also described as fast. You can also talk aboutmoving fast, orgetting faster.