system, systematic, systematically, systematize
nation, national, nationally, nationalize
nature, natural, naturally, naturalize
symbol, symbolic, symbolically, symbolize
organ, organic, organically, organize
harmony, harmonic, harmonically, harmonize
popularity, popular, popularly, popularize
character,characteristic, characteristically, characterize
memory, memorial, memorially（まれ）, memorize
drama, dramatic, dramatically, dramatize
development, developmental, developmentally, develop
simplicity, simple, simply, simplify
personality, personal, personally, personalize
terror, terrible, terribly, terrify
horror, horrible, horribly, horrify
theory, theoretical, theoretically, theorize
energy, energetic, energetically, energize
たとえば以上のようなのが、高校レベルの単語でありますがいかがでしょうか？
お礼
ありがとうございます。こんなにあるとは思いませんでした。