Modifiers matching energy:

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

Simple categories matching renewable:

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