65 radical synonyms include thoroughgoing, thorough, complete, total, entire, absolute, utter, comprehensive, exhaustive, and root-and-branch. Radical is an adjective, and its antonyms are moderate and conservative. Here are some additional synonyms for "radical" with example sentences.
65 other ways to say radical.
His ideas were considered radical at first.
She made a radical lifestyle change.
They proposed a radical new solution.