Modifiers matching energy:

• natural,
• light,
• intense,
• physical,
• off,
• mental,
• high,
• clean,
• electromagnetic,
• atmospheric,
• renewable,
• good,
• mechanical,
• invisible,
• conventional,
• central,
• religious,
• simple,
• subtle,
• external,
• thermal,
• outside,
• strong,
• cheap,
• molecular,
• surrounding,
• domestic,
• final,
• visible,
• cleaner,
• sufficient,
• available,
• useful,
• extraordinary,
• directed,
• clear,
• destructive,
• optical,
• secondary,
• commercial,
• new,
• contemporary,
• cohesive,
• demanding,
• geophysical,
• harmful,
• solar,
• divine,
• diverse,
• related,
• concentrated,
• internal,
• easy,
• noxious,
• noncommercial,
• elemental,
• kinetic,
• essential,
• electrical,
• world,
• spectral,
• ambient,
• electric,
• tangible,
• non-visible,
• magnetic,
• passive,
• functional,
• marine,
• intensive,
• home,
• efficient,
• powerful,
• unwanted,
• cold,
• exotic,
• excessive,
• primary,
• negative,
• ordinary,
• cosmic,
• radiant,
• mystical,
• direct,
• spiritual,
• convenient,
• dynamical,
• widespread,
• therapeutic,
• intermediate,
• acoustic,
• psychological,
• positive,
• incident,
• dangerous,
• usable,
• bad,
• modern,
• vibrational,
• relevant,
• abstract,
• warming,
• nuclear,
• free,
• consumable,
• lower,

Simple categories matching renewable:

• system,
• product,
• energy,
• tree,
• material,
• substance,
• substrate,
• softwood,
• electricity,
• fibre,
• source,
• plant,
• fiber,
• waste,
• polymer,
• molecule,
• fuel,
• resource,
• tissue,
• wood,
• sugar,
• elements,
• structure,