Modifiers matching rock:

• hard,
• sedimentary,
• lightweight,
• good,
• compact,
• volcanic,
• metamorphic,
• barren,
• older,
• korean,
• igneous,
• resistant,
• unusual,
• coarse,
• exotic,
• size,
• stronger,
• strong,
• crystalline,
• russian,
• crustal,
• available,
• granular,
• primary,
• underlying,
• typical,
• hardest,
• heavy,
• virgin,
• durable,
• porous,
• soft,
• industrial,
• heated,
• frozen,
• permeable,
• british,
• white,
• solid,
• crushed,
• refractory,
• local,
• powdered,
• free,
• modern,
• colored,
• coloured,
• brittle,
• original,
• magnetic,
• lighter,
• widespread,
• red,
• soluble,
• heavier,
• consolidated,
• rough,
• sticky,
• flinty,
• unconsolidated,
• argillaceous,
• tight,
• rigid,
• tough,
• colorful,
• suitable,
• reflective,
• angular,
• plutonic,
• ductile,
• light,
• nonporous,
• opaque,
• polyphase,
• calcareous,
• vitreous,
• hot,
• normal,
• friable,
• polished,
• precious,
• surrounding,
• deleterious,
• indigenous,
• pulverized,
• ingenious,
• impenetrable,
• sedentary,
• homogeneous,
• carbonaceous,
• geologic,
• spherical,
• simple,
• common,
• salt,
• flat,
• intermediate,
• large,
• related,
• anisotropic,
• ordinary,
• reactive,
• siliceous,
• noble,
• flying,
• dense,
• firm,
• ornamental,
• crumbly,
• egyptian,
• artificial,
• native,
• softer,
• refractive,
• intrusive,
• smaller,
• dated,
• difficult,
• weaker,
• weak,
• smooth,
• decorative,
• aluminous,
• metallic,
• glassy,
• impervious,
• organic,
• fragmented,
• massive,
• looking,
• acid,
• conductive,
• useful,
• covered,
• impermeable,
• uniform,
• planetary,
• enough,
• insoluble,
• chemical,
• azonic,
• inappropriate,
• sharp,
• polycrystalline,
• terrestrial,
• stable,
• isolated,
• non-porous,
• acidic,
• bituminous,
• extrusive,
• subsurface,
• extraterrestrial,
• heterogeneous,
• alkaline,
• elastic,
• clastic,
• inert,
• unstable,
• base,
• marine,
• harder,
• visible,
• traditional,
• new,
• eruptive,
• dry,
• rich,
• fine,
• geological,
• loose,
• natural,
• fragile,
• abrasive,
• dark,
• combustible,
• textured,
• basic,
• molten,
• competent,
• small,
• abundant,

Simple categories matching stronger:

• animal,
• glue,
• entity,
• drug,
• material,
• character,
• ability,
• dragon,
• power,
• wood,
• adversary,
• passion,
• fibre,
• metal,
• rock,
• fish,
• light,
• analgesic,
• synthetic,
• predator,
• component,
• alloy,
• force,
• web,
• beer,
• structure,
• substance,
• unit,
• emotion,
• prey,
• opponent,