You can`t win.

Anonymous

This is a test that only I know the answers to. You`ll have to win through Trial and error.
1. What WW is associated with the energy created and released by stars?
Ventro
Dracano
Necro
Hydro
Abro/Aberm
Acro
Uro
Draco
Aquo/Aqua
Cijo
Terro
Xeno
Techno
Echno
Ethno
Zuno
Yuano
Nithno
Bievo
Iiso
Suso
Welvo
Trefo
Conkero
Oneno