fast

The word “fast” has 1 syllable: fast

It's pronounced as /fæst/

What is synonym and antonym for fast?

In the thesaurus, “fast” has 485 synonyms and 278 antonyms.

Here are synonyms and antonyms for fast along with examples of usage in sentences.

Synonyms for fast

PDQ
a mile a minute
abbreviated
abridged
abrupt
abruptly
absolutely
abstain
abstinence
abundantly
accelerated
active
acute
adherent
agile
alert
all
all of
all over
all the way
altogether
anchored
apace
appetite
apt
ardent
artful
astute
at full throttle
at full tilt
at length
at speed
attached
avid
basically
bawdy
beefy
beguiling
belly
bent
blistering
blue streak
bombproof
bonded
bound
brainy
breakneck
breathless
breathtaking
brief
bright
brilliant
brisk
briskly
by and large
by leaps and bounds
cagey
cagy
careless
categorically
cemented
cerebral
chiefly
chop-chop
clamped
clean
clever
close
cohesive
cold
compact
compendious
completely
concise
condensed
confirmed
constant
constrained
copiously
crafty
craving
creative
crisp
crooked
cunning
curtailed
cut-back
dashing
dead
debauched
deceitful
deceiving
deceptive
dedicated
deeply
defrauding
deluding
delusive
delusory
deny oneself
dependable
depraved
determined
devil-may-care
devious
devoted
devout
diet
discerning
dishonest
dissipated
dissolute
dizzy
double-dealing
double-quick
double-time
down the line
down to the ground
down-the-line
downright
duplicitous
durable
dutiful
dyed-in-the-wool
easy
educated
electric
embedded
emptiness
energetic
energetically
enough
enthusiastic
entire
entirely
entrenched
ephemeral
epigrammatic
erudite
even
exactly
exceptional
expeditious
expeditiously
expeditive
extravagant
faithful
false
famine
famish
famishment
fastened
fasting
fervent
fervid
firm
firmly
flashing
flat
flat-out
fleet
fleet-footed
fleeting
fleetly
flirtatious
flying
for fair
forbear
fortified
foxy
fraudulent
frivolous
frozen
full
full tilt
fully
furtive
gadabout
galloping
generally
generously
genial
giddy
glued
gluttony
go hungry
good
gourmandism
greatly
greed
guileful
gung ho
hairtrigger
hands down
hard
hastened
hastily
hasty
heady
heartily
held
hell-for-leather
high-speed
highbrow
hoggishness
hot
hunger
hunger strike
hurried
hurriedly
hyperintelligent
hypersonic
imbedded
immediately
immovable
impacted
impassioned
impermanent
impetuously
implanted
impregnable
impulsively
in a flash
in a hurry
in a jiffy
in haste
in nothing flat
in short order
in whole
incontinent
indecent
indelible
inextricable
informed
infrangible
ingenious
insidious
insightful
intelligent
intemperate
intent
intrenched
inventive
inveterate
irrefragable
jammed
judicious
keen
knowing
knowledgeable
laconic
largely
lascivious
lasting
learned
lecherous
lewd
libertine
libidinous
licentious
lickety split
lickety-split
light
lightning
like a bat out of hell
like a flash
like a shot
like all get out
like crazy
like gangbusters
like greased lightning
like mad
like wildfire
literate
little
lodged
logical
loose
loyal
lustful
mainly
malnutrition
momentary
more or less
mostly
munchies
nimble
nippy
not eat
on the double
out
overall
passionate
perceptive
percipient
perfectly
perfidious
permanent
perspicacious
pious
pithy
plain
plumb
posthaste
predominantly
predominately
presto
primarily
principally
profligate
prompt
promptly
pronto
prudent
quick
quick-witted
quickened
quickly
quite
racing
rakish
rapaciousness
rapacity
rapid
rapid-fire
rapidly
rashly
rational
rattling
ravenousness
readily
ready
reasonable
reckless
recklessly
refrain
reliable
resistant
resolute
resourceful
responsible
rogue
rush
rushed
sagacious
sage
salacious
sane
sapient
savvy
scholarly
schooled
secure
secured
securely
self-gratifying
self-indulgent
sensible
serious
set
shady
sharp
sharp-witted
shifty
short
short-lived
short-range
short-term
shortened
shortish
shrewd
skilled
slick
slippery
sly
smart
snap
snappily
snappy
sneaking
sneaky
snug
solid
solidly
soon
sound
soundly
speedball
speedily
speedy
split-second
splitting
sportive
sporty
stable
stalwart
stanch
starvation
starve
staunch
steadfast
steadfastly
steady
stomach
stone
stone-cold
strenuous
strong
stuck
sturdy
substantially
subtle
succinct
sudden
suddenly
summary
supersmart
supersonic
sure
sweet tooth
swift
swiftly
sworn
syncopated
tenacious
terse
thoroughly
through and through
tight
tightly
to bits
to pieces
to the hilt
to the max
totally
tough
trained
transient
transitory
treacherous
trickish
tricky
tried
tried-and-true
true
true blue
true-blue
trustworthy
trusty
ultrafast
ultrarapid
ultrasmart
unbreakable
unchaste
unconscionable
underhand
underhanded
undernourishment
unethical
unfaltering
unhesitating
unprincipled
unqualifiedly
unscrupulous
unwavering
unyielding
utterly
velocious
vigorous
vigorously
voraciousness
voracity
wanton
wedged
well
well-read
whirlwind
wholly
wide
wild
wily
winged
wise
xerophagy
zippy

Antonyms for fast

aboveboard
absurd
airheaded
apathetic
approximately
asinine
balmy
barely
belatedly
birdbrained
boneheaded
boobish
brain-dead
brainless
bubbleheaded
changeable
chaste
chuckleheaded
clumsy
cockeyed
conscientious
crackpot
cram
crawling
crazy
cuckoo
daffy
daft
dallying
dawdling
decent
deliberate
deliberately
delinquently
dense
detached
dilatory
dillydallying
dim
dim-witted
dippy
dislodged
disloyal
dispassionate
doltish
dopey
dopy
dorky
dotty
dragging
dubious
dull
dumb
dunderheaded
eat
eating
empty-headed
endless
enlarged
ephemeral
ethical
everlasting
expanded
extended
faithless
false
faltering
far
fatuous
feast
featherheaded
feebleminded
fickle
fill
flexible
fool
foolish
forthright
freed
fullness
glut
gluttony
gobble
good
gorge
gorging
gormandize
gormless
great
gulp
guzzle
half
half-baked
half-witted
halfway
hardly
harebrained
hesitant
honest
honorable
idiotic
idiotical
ignorant
illiterate
imbecile
imbecilic
impermanent
inappetence
incompletely
inconstant
indefinite
indulge
indulgence
infirm
insane
insecure
interminable
irresolute
irresponsible
just
kind of
knuckleheaded
kookie
kooky
laggard
laggardly
lamebrain
lamebrained
languid
late
leisurely
lengthy
lingering
lingeringly
long
long-drawn
long-drawn-out
long-lived
long-range
long-term
longish
looney
loony
loose
loosely
loosened
lowbrow
lunatic
lunkheaded
mad
marginally
measured
mindless
minimally
moral
moronic
movable
moveable
moving
nice
nonintellectual
nonsensical
nutty
obtuse
opaque
overlong
part
partially
partly
perfidious
permanent
persistent
pig out
pinheaded
plodding
ploddingly
pokey
poking
poky
preposterous
prolonged
protracted
pure
recreant
repleteness
repletion
rickety
roughly
sappy
sate
satiation
satiety
satisfaction
scarcely
screwball
scrupulous
senseless
shaky
silly
simple
simpleminded
slightly
slow
slow-witted
slowish
slowly
sluggish
sluggishly
soft
softheaded
somewhat
straight
straightforward
strict
stuff
stuffing
stupid
superficially
supplemented
surfeit
tardily
tardy
temporary
thick
thick-witted
thickheaded
tomfool
tottering
tottery
traitorous
treacherous
ultraslow
unacademic
unattached
unbalanced
unbound
unbrilliant
uncertain
uncorrupt
undependable
undone
uneducated
unending
unfaithful
unfastened
unfixed
unfixedly
unhurried
uninformed
unintellectual
unintelligent
uninterested
unreliable
unsecured
unsmart
unsound
unstable
unsteady
unsubstantial
untaught
unthinking
untrue
untrustworthy
unwise
upright
vacillating
vacuous
virtuous
wabbly
wacky
wavering
weak
weak-minded
whacky
witless
wobbly
yielding
zany

Meanings of fast

noun
1. A train that calls at only some stations it passes between its origin and destination, typically just the principal stations.
2. The act or practice of abstaining from food or of eating very little food.
3. The period of time during which one abstains from or eats very little food.
adjective
1. Firmly or securely fixed in place; stable.
2. Firm against attack; fortified by nature or art; impregnable; strong.
3. (of people) Steadfast, with unwavering feeling. (Now mostly in set phrases like fast friend(s).).
4. Moving with great speed, or capable of doing so; swift, rapid.
5. Causing unusual rapidity of play or action.
6. (of a piece of hardware) Able to transfer data in a short period of time.
7. Deep or sound (of sleep); fast asleep (of people).
8. (of dyes or colours) Not running or fading when subjected to detrimental conditions such as wetness or intense light; permanent.
9. Tenacious; retentive.
10. Having an extravagant lifestyle or immoral habits.
11. Ahead of the correct time or schedule.
12. (of photographic film) More sensitive to light than average.
adverb
1. In a firm or secure manner, securely; in such a way as not to be moved; safe, sound .
2. (of sleeping) Deeply or soundly .
3. Immediately following in place or time; close, very near .
4. Quickly, with great speed; within a short time .
5. Ahead of the correct time or schedule.
interjection
1. Short for "stand fast", a warning not to pass between the arrow and the target.
verb
1. To restrict one’s personal consumption, generally of food, but sometimes other things, in various manners (totally, temporally, by avoiding particular items), often for religious or medical reasons.

Example Sentences

He ran fast to catch the bus before it left.
The internet connection was so fast that videos loaded instantly.
She is known for being a fast learner who grasps new concepts quickly.
They had to drive fast to reach the airport on time.
The fast pace of the city life can be overwhelming for some people.

On this page you'll find 763 synonyms, antonyms, or another words to fast, such as: PDQ, a mile a minute, abbreviated, aboveboard, abridged, abrupt, abruptly.

Make sure to choose synonyms and antonyms that are appropriate for the context of the sentence.