foul (n.)
- abase
- abuse
- arrant
- bad
- bag
- bang
- bar
- base
- bawdy
- belittling
- bent
- bind
- black
- block
- blockade
- blow
- blue
- botch
- bound
- bump
- bung
- bungle
- cannon
- carom
- cataleptic
- catch
- caulk
- chink
- choke
- clash
- clog
- convert
- cork
- cover
- crash
- criminal
- crude
- crunch
- dam
- dark
- dead
- defile
- discredit
- disgrace
- dishonor
- double-dealing
- dreadful
- encounter
- entangle
- evil
- festering
- fill
- flat
- forbidding
- full
- gamy
- grave
- grime
- gross
- grubby
- harpoon
- heavy
- high
- hit
- hook
- hurt
- icky
- illegality
- infraction
- infringement
- invective
- jam
- knock
- land
- lasso
- little
- logy
- lousy
- low
- low-down
- lurid
- mean
- meet
- mesh
- mess
- misuse
- muff
- nail
- nasty
- nauseant
- net
- noose
- off
- offensive
- olid
- pack
- passive
- pervert
- petty
- plug
- poky
- poor
- prostitute
- raging
- rank
- raw
- repellent
- reprobate
- reptilian
- ribald
- rope
- rotting
- rough
- rude
- ruin
- sack
- sad
- schlock
- scurvy
- septic
- shoddy
- sideswipe
- sinful
- slack
- sleeping
- small
- smash
- smear
- smelling
- smirch
- smooch
- smudge
- snafu
- snag
- snare
- snarl
- soil
- spear
- spile
- spoil
- stain
- standing
- static
- stay
- stench
- stop
- stopper
- stopple
- storming
- strike
- strong
- stuff
- sully
- taint
- take
- tame
- tangle
- tarnish
- terrible
- trap
- twist
- unfair
- unfairness
- unmentionable
- venal
- vile
- violation
- vitiate
- wet
- worst
- wrong
foul (v.)
- abase
- abuse
- adulterate
- afoul
- arrant
- asperse
- bad
- bag
- bang
- bar
- base
- befoul
- begrime
- belittle
- besmirch
- bind
- black
- blacken
- block
- blockade
- blow
- blue
- botch
- bound
- bump
- bung
- bungle
- cannon
- carom
- catch
- caulk
- chink
- choke
- clash
- clog
- collide
- concuss
- congest
- constipate
- contaminate
- convert
- cork
- corrupt
- cover
- crash
- crump
- crunch
- dam
- dead
- debase
- defalcate
- defame
- defile
- degrade
- demean
- denigrate
- depreciate
- derogate
- desecrate
- devaluate
- dirty
- discredit
- disgrace
- dishonor
- disparage
- divert
- dormant
- dull
- embezzle
- encounter
- enmesh
- ensnare
- entangle
- entrap
- evil
- fill
- flat
- full
- grave
- grime
- gross
- harpoon
- high
- hit
- hook
- hurt
- hurtle
- impinge
- infect
- jam
- knock
- land
- lasso
- little
- low
- mean
- meet
- mesh
- mess
- misapply
- misappropriate
- mishandle
- mismanage
- misuse
- muff
- nail
- net
- noose
- obstipate
- obstruct
- off
- pack
- peculate
- percuss
- pervert
- pilfer
- plug
- pollute
- profane
- prostitute
- rank
- raw
- reprobate
- rope
- rough
- rude
- ruin
- sack
- sideswipe
- slack
- smash
- smear
- smirch
- smooch
- smudge
- snafu
- snag
- snare
- snarl
- soil
- spear
- spoil
- stain
- stale
- stanch
- stay
- stop
- stopper
- stopple
- strike
- stuff
- sully
- taint
- take
- tame
- tangle
- tarnish
- trap
- turned
- twist
- vile
- violate
- vitiate
- wet
- whomp
- worst
- wrong
foul (adj.)
- abeyant
- abhorrent
- abject
- abominable
- abusive
- adulterate
- adulterated
- adverse
- afoul
- angry
- apathetic
- arrant
- atrocious
- awful
- bad
- bag
- bang
- bar
- base
- bawdy
- beastly
- beggarly
- belittling
- bent
- black
- blamable
- blameworthy
- blasphemous
- block
- blocked
- blow
- blue
- blustery
- bound
- brackish
- brutal
- calumniatory
- calumnious
- carious
- cataleptic
- catatonic
- cheesy
- choked
- clogged
- cloudy
- cloying
- coarse
- comminatory
- congested
- constipated
- contaminated
- contemptible
- contumelious
- corrupt
- costive
- cover
- crappy
- criminal
- crooked
- crude
- crummy
- cyclonic
- dam
- damnable
- damnatory
- dangerous
- dark
- dead
- debased
- decayed
- decomposed
- defamatory
- defiled
- degraded
- denunciatory
- deplorable
- depraved
- deprecative
- deprecatory
- depreciative
- depreciatory
- derisive
- derisory
- derogatory
- despicable
- detestable
- dire
- dirty
- disagreeable
- disgraceful
- disgusting
- dishonest
- dishonorable
- disparaging
- dopey
- dormant
- double-dealing
- dreadful
- dull
- dysphemistic
- egregious
- enmeshed
- enormous
- entangled
- evil
- execrable
- fecal
- feculent
- fetid
- filthy
- flagitious
- flagrant
- flat
- flyblown
- forbidden
- forbidding
- foul-mouthed
- foul-spoken
- fouled
- fraudulent
- frightful
- frowsty
- frowzy
- full
- fulsome
- funky
- fusty
- gamy
- gangrenous
- ghastly
- grave
- grievous
- grisly
- groggy
- gross
- grubby
- gruesome
- harmful
- hateful
- heavy
- heinous
- hideous
- high
- hit
- hook
- horrible
- horrid
- hurt
- icky
- ignoble
- ignominious
- ill-smelling
- illegal
- immodest
- immoral
- improper
- impure
- inactive
- indecent
- indelicate
- inert
- infamous
- iniquitous
- injurious
- insalubrious
- insanitary
- insulting
- jammed
- knavish
- knock
- lamentable
- land
- languid
- languorous
- latent
- leaden
- lewd
- licentious
- lifeless
- little
- loathsome
- logy
- lousy
- low
- low-down
- lumpen
- lurid
- maggoty
- malodorous
- mangy
- mawkish
- mean
- measly
- meet
- mephitic
- miasmal
- miasmic
- miserable
- moldy
- monstrous
- morbific
- mortified
- mouldy
- mucky
- musty
- nasty
- naughty
- nauseating
- nauseous
- necrotic
- nefarious
- net
- noisome
- notorious
- noxious
- objectionable
- obnoxious
- obscene
- obstructed
- odious
- odorous
- off
- offensive
- olid
- outrageous
- overripe
- packed
- paltry
- passive
- pathogenic
- peccant
- perfidious
- pestiferous
- petty
- phlegmatic
- pitiable
- pitiful
- plugged
- poisonous
- poky
- polluted
- poor
- pornographic
- profane
- prohibited
- putrefacient
- putrefactive
- putrescent
- putrid
- raging
- rainy
- rancid
- rank
- raunchy
- raw
- reasy
- rebarbative
- reechy
- reeking
- regrettable
- repellent
- repelling
- reprehensible
- reprobate
- reptilian
- repugnant
- repulsive
- revolting
- ribald
- risque
- rotten
- rough
- rude
- sad
- salacious
- scabby
- scandalous
- scatological
- scornful
- scrubby
- scruffy
- scummy
- scurfy
- scurrilous
- scurvy
- sedentary
- septic
- shabby
- shady
- shameful
- shitty
- shocking
- shoddy
- sickening
- sinful
- slack
- slanderous
- sleeping
- sleety
- slimy
- sloppy
- sluggish
- slushy
- small
- smelling
- smelly
- smoldering
- smutty
- snafu
- snarled
- snowy
- soil
- soiled
- sordid
- soured
- spoiled
- squalid
- stagnant
- stale
- standing
- static
- stinking
- stop
- stopped
- stormy
- strong
- stuffed
- stuffy
- suggestive
- sulfurous
- sultry
- suppurative
- suspended
- tainted
- tame
- tangled
- tempestuous
- terrible
- torpid
- traitorous
- treacherous
- turbulent
- turned
- two-faced
- ulcerated
- unchaste
- unclean
- uncleanly
- uncouth
- underhanded
- unfair
- unfavorable
- unforgivable
- unhealthful
- unhealthy
- unhygienic
- unjust
- unmentionable
- unpardonable
- unprintable
- unrepeatable
- unsanitary
- unscrupulous
- unspeakable
- unsporting
- unsportsmanlike
- unwholesome
- unworthy
- venal
- vicious
- vile
- villainous
- violate
- vituperative
- vulgar
- wet
- wicked
- windy
- woeful
- wormy
- worst
- worthless
- wretched
- wrong
- yucky
And my imaginations are as foul
As Vulcan's stithy.
Foul deeds will rise,
Though all the earth o'erwhelm them, to men's eyes.
Fair is foul, and foul is fair.