Radical and Ultras

Radical noun - A person who favors rapid and sweeping changes especially in laws and methods of government.

Ultras and radical are semantically related In some cases you can replace term "Ultras" with "Radical", this nouns are similar.

Nearby Words: radically, radicalism, radicalize, radicalise, radicalised

Radical and ultras are semantically related in enthusiast topic. You can use "Radical" instead a noun "Ultras", if it concerns topics such as extremist, person zealous about a belief.