Radicality

[Jessica]

Radicalness; relation to a root in essential nature or
principle.

[Luis Fok]

A quality that describes a person with radical thoughts and ideas. Radical, as in an extremist, rebellious, and revolutionary kind of way.

It cant really be used in a sentence, because it may not sound right, but hey, its better than radicalness.

See [radical].

[Tanya Shivari]

As defined by: a level of excellence achieved by a group, or individual.