Part of speech:
Without law; not regulated by the authority of law
Considered contrary to the institutions or principles of the United States.
Find another word for unconstitutional. In this page you can discover 10 synonyms, antonyms, idiomatic expressions, and related words for unconstitutional, like: constitutional, illegal, lawless, inadmissible, unconstitutionally, indefensible, impermissible, illiberal, un-american and undemocratic.