Fast synonyms such as eat nothing, accelerated, affix, boon, debauched, a mile a minute, abstain from food, and deny oneself food. Fast is an adjective, and its antonyms are slow and slowly.
Another word for Fast
1. speedy
2. secure
3. loyal
4. wild
5. quickly
- without delay
- with dispatch
- with all haste
- swiftly
- speedily
- rapidly
- quickly
- post-haste
- pell-mell
- p.d.q. (pretty damn quick)
- on the double
- nippily
- like the wind
- like the deuce
- like the clappers
- like nobody's business
- like mad
- like crazy
- like billy-o
- like a shot
- like a scalded cat
- like an arrow from a bow
- like a flash
- like a bomb
- like a bat out of hell
- like (greased) lightning
- lickety-split
- in the blink of an eye
- in no time (at all)
- in haste
- in double quick time
- in a wink
- in a trice
- in a hurry
- in a flash
- hurriedly
- hell for leather
- hastily
- expeditiously
- energetically
- double quick
- briskly
- at warp speed
- at the speed of light
- at speed
- at full tilt
- at full speed
- at a rate of knots
- apace
- a mile a minute
6. refrain from eating
- starve oneself
- refrain from eating
- period of fasting
- period of abstinence
- hunger strike
- go without food
- go on hunger strike
- go hungry
- eat nothing
- diet
- deny oneself food
- abstain from food