Word Type

Adjective

Noun

Adjective

The word "illegal" can be used as adjective, noun and adjective.

Word Relationships

Opposites (Antonyms)

lawful legal

Derived Terms

illegal alien illegal combatant illegal forward kick illegal immigrant illegal immigration illegal number illegal prime illegalisation illegalise illegalism illegalist illegalize illegalness

Etymologically Related To

illegal alien illegal immigrant

Context

espionage offensive philately us

Related Terms

contraband criminal law fictitious forbidden illegal immigrant illegally illegitimate irregular rule spy undercover unlawful

Similar Terms

amerciable amerciable banned black black market black-market bootleg contraband criminal dirty embezzled extrajudicial extrajudicial extralegal extralegal felonious felonious hot hot ill gotten ill-gotten illegitimate illicit ineligible ineligible irregular misappropriated misappropriated misbranded misbranded mislabeled nonlegal outlaw outlawed outlawed penal prohibited prohibited punishable punishable smuggled under counter under-the-counter unlawful unratified unratified

Synonym Network

bogus criminal

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.