Modifiers matching separation:

• natural,
• necessary,
• visual,
• physical,
• permanent,
• parental,
• secondary,
• metal,
• chemical,
• temporary,
• mechanical,
• subsurface,
• big,
• economic,

Simple categories matching metal:

• object,
• item,
• frame,
• coagulant,
• screen,
• work,
• structure,
• peroxide,
• kitchenware,
• surface,
• part,
• stabilizer,
• gasket,
• cation,
• solute,
• medium,
• vehicle,
• toner,
• plane,
• form,
• skeleton,
• section,
• kettle,
• restoration,
• quality,
• material,
• oxidant,
• paste,
• tool,
• enclosure,
• borate,
• resource,
• atom,
• weaponry,
• system,
• alloy,
• piece,
• gear,
• member,
• perchlorate,
• junk,
• hydroxide,
• pan,
• powder,
• finish,
• accessory,
• production,
• vanadate,
• ball,
• flashing,
• artifact,
• mixture,
• content,
• wire,
• ware,
• cathode,
• merchandise,
• chromate,
• dioxide,
• source,
• strip,
• precipitate,
• carbide,
• hinge,
• wall,
• beads,
• product,
• cyanide,
• tableware,
• drier,
• phosphate,
• building,
• attachment,
• separation,
• instrument,
• element,
• shaft,
• side,
• bracelet,
• mold,
• sheeting,
• decoration,
• bath,
• framework,
• fastener,
• fencing,
• sphere,
• button,
• blade,
• sulphate,
• premium,
• charm,
• preparation,
• base,
• stone,
• characteristic,
• seal,
• foil,
• mirror,
• rod,
• establishment,
• armor,
• appendage,
• construction,
• conduit,
• action,
• compound,
• halide,
• cable,
• rack,
• coating,
• leaf,
• unit,
• tank,
• foundry,
• sponge,
• body,
• acetate,
• area,
• jewellery,
• ornament,
• species,
• layer,
• tube,
• web,
• sector,
• block,
• strengthener,
• scrap,
• contaminant,
• aggregate,
• desk,
• lure,
• dish,
• vessel,
• fluoride,
• toy,
• worker,
• protector,
• level,
• precursor,
• electrolyte,
• thing,
• fixture,
• container,
• composition,
• constituent,
• ornamentation,
• conductor,
• price,
• plate,
• dowel,
• chloride,
• floor,
• chemical,
• fabrication,
• gauze,
• solution,
• appliance,
• fixing,
• coil,
• amalgam,
• property,
• balsam,
• sheet,
• pot,
• toxicity,
• bolt,
• sulfate,
• nitride,
• tip,
• industry,
• spring,
• grille,
• mineral,
• coolant,
• crown,
• electrode,
• jacket,
• assembly,
• case,
• foam,
• process,
• fragment,
• film,
• silicate,
• workpiece,
• activator,
• complex,
• radical,
• filler,
• pattern,
• granule,
• jewelry,
• pole,
• carbonate,
• dryer,
• particulate,
• detritus,
• shelf,
• hero,
• art,
• nucleus,
• filter,
• cask,
• ladder,
• string,
• cap,
• implement,
• utensil,
• gas,
• mass,
• line,
• car,
• clay,
• furniture,
• scraper,
• findings,
• recovery,
• trifle,
• culvert,
• box,
• obstruction,
• lot,
• edge,
• stamp,
• carbonyl,
• stuff,
• centre,
• concentration,
• salt,
• strap,
• commodity,
• tubing,
• trim,
• hardware,
• concentrate,
• sulfide,
• steel,
• weapon,
• group,
• sulphide,
• component,
• abrasive,
• substance,
• housing,
• battery,
• machine,
• artefact,
• portion,
• pipe,
• fiber,
• reductase,
• ingot,
• state,
• hydride,
• iron,
• dishware,
• azide,
• solid,
• contamination,
• bicarbonate,
• ion,
• disc,
• article,
• district,
• fastening,
• sculpture,
• sign,
• molding,
• manganate,
• assets,
• tag,
• oxide,
• track,
• adventurer,
• pyrophosphate,
• refinery,
• deposit,
• facility,
• catalyst,
• connector,
• equipment,
• clip,
• tm,
• shot,
• glasses,
• panel,
• agent,
• anode,
• smelter,
• ground,
• railing,
• mandrel,
• feature,
• band,
• washer,
• substrate,
• shield,
• needle,
• nitrate,
• projectile,
• support,
• activity,
• dross,
• token,
• shape,
• chair,
• framing,
• furnishing,
• silicide,
• waste,
• post,
• canister,
• ore,
• value,
• ligand,
• cookware,
• works,
• device,
• particle,
• motif,
• filling,