All conventionalist antonyms

noun conventionalist

• radical — of or going to the root or origin; fundamental: a radical difference.
• left wing — members of a liberal or radical political party, or those favoring extensive political reform.
• liberal — favorable to progress or reform, as in political or religious affairs.
• progressive — favoring or advocating progress, change, improvement, or reform, as opposed to wishing to maintain things as they are, especially in political matters: a progressive mayor.