Modifiers matching rock:

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

Simple categories matching softer:

• material,
• information,
• metal,
• ground,
• bone,
• item,
• wood,
• pastel,
• filling,
• food,
• surface,
• property,
• fabric,
• particle,
• tissue,
• rubber,
• equipment,
• bean,
• wine,
• fibre,
• fiber,
• wire,
• product,
• substrate,
• cheese,
• structure,
• medium,
• substance,
• area,
• fruit,
• thing,
• ore,
• abrasive,
• part,
• rock,
• white,
• resin,
• meat,
• ingredient,
• decoration,
• organism,
• element,
• commodity,
• veggie,
• stone,
• formation,
• tree,
• aggregate,
• ion,
• floor,
• alloy,
• legume,
• vegetable,
• measure,
• covering,
• feelings,
• solid,
• cord,
• hardwood,
• soil,
• gem,
• concept,
• attribute,
• mineral,
• variable,
• unit,
• sediment,