peccant (adj.)
- aberrant
- abominable
- abroad
- adrift
- amiss
- arrant
- askew
- atrocious
- awry
- bad
- base
- black
- blamable
- blameworthy
- carious
- censurable
- contaminated
- corrupt
- criminal
- culpable
- damnable
- dark
- decayed
- deceptive
- decomposed
- defective
- delusive
- deviant
- diseased
- disgraceful
- distorted
- errant
- erring
- erroneous
- evil
- execrable
- fallacious
- false
- faulty
- flagitious
- flagrant
- flawed
- foul
- gangrenous
- guilty
- harmful
- heinous
- heretical
- heterodox
- ill
- illogical
- illusory
- impeachable
- implicated
- improper
- inaccurate
- inauspicious
- indictable
- inexpedient
- infamous
- infected
- inferior
- iniquitous
- injurious
- insalubrious
- insanitary
- invalid
- involved
- knavish
- low
- malevolent
- monstrous
- morbid
- morbific
- mortified
- naughty
- necrotic
- nefarious
- noisome
- noxious
- off
- out
- pathogenic
- pathological
- perverse
- perverted
- pestiferous
- polluted
- putrescent
- putrid
- rank
- reprehensible
- reproachable
- reprobate
- rotten
- scandalous
- self-contradictory
- septic
- shameful
- sinful
- sinister
- spoiled
- straying
- suppurative
- tainted
- ulcerated
- ulcerous
- unfavorable
- unforgivable
- unhealthful
- unhealthy
- unhygienic
- unkind
- unorthodox
- unpardonable
- unpleasant
- unproved
- unsanitary
- unskillful
- unspeakable
- untoward
- untrue
- unwholesome
- unworthy
- vicious
- vile
- villainous
- wicked
- wide
- wrong
