1. extremist
2. ultra, immoderate, revolutionary
3. new, basic
4. form
5. word form, signifier, descriptor, radical

1. basal, group
2. chemical group, unit, building block, free radical
3. atom, person
4. individual, someone, somebody, mortal, human, soul, character
5. grapheme, graphic symbol, radical sign
6. mathematical notation, root
6. root word, base, stem, theme, form, word form, signifier, descriptor