illegal (adj.)

• aberrant
• abnormal
• abominable
• actionable
• anarchic
• anarchistic
• anomic
• atrocious
• banned
• barred
• black-market
• bootleg
• chargeable
• contraband
• criminal
• delinquent
• deviant
• disgraceful
• evil
• felonious
• flawed
• forbidden
• hot
• ignominious
• illegitimate
• illicit
• impermissible
• improper
• inappropriate
• incorrect
• indecorous
• inequitable
• infamous
• iniquitous
• irregular
• lawless
• nonlegal
• off-base
• off-color
• outlaw
• outlawed
• prohibited
• proscribed
• punishable
• sacrilegious
• scandalous
• shameful
• shameless
• sinful
• taboo
• terrible
• unauthorized
• unbalanced
• unconstitutional
• under-the-counter
• under-the-table
• undeserved
• undue
• unequal
• uneven
• unfit
• unfitting
• unjust
• unlawful
• unlicensed
• unmerited
• unofficial
• unrighteous
• unsanctioned
• unseemly
• unsuitable
• untouchable
• unwarrantable
• unwarranted
• verboten
• wicked
• wrong
• wrongful