Modifiers matching steel:

• hard,
• metal,
• exotic,
• cold,
• refined,
• special,
• alloyed,
• dissimilar,

Simple categories matching hard:

• needle,
• surface,
• straw,
• appendage,
• material,
• barrier,
• tool,
• tissue,
• veggie,
• landscaping,
• object,
• place,
• medication,
• wood,
• weapon,
• toy,
• event,
• part,
• narcotic,
• copy,
• food,
• stone,
• power,
• rock,
• substrate,
• language,
• liquor,
• region,
• button,
• constraint,
• form,
• wheat,
• stuff,
• prey,
• instrument,
• beads,
• ore,
• space,
• furnishing,
• bones,
• helmet,
• crystal,
• armor,
• plastic,
• boundary,
• rind,
• point,
• backing,
• spirits,
• resin,
• candy,
• fact,
• failure,
• knowledge,
• segment,
• scale,
• choice,
• discipline,
• packing,
• contaminant,
• activity,
• hat,
• paper,
• artifact,
• wealth,
• thermoplastic,
• belt,
• gem,
• profession,
• technology,
• bone,
• instrumentality,
• disease,
• particulate,
• case,
• monomer,
• board,
• base,
• metal,
• booze,
• coal,
• feature,
• labour,
• brush,
• organism,
• bronze,
• wall,
• film,
• engineering,
• coral,
• area,
• alloy,
• softwood,
• scientist,
• defence,
• cheese,
• drug,
• apple,
• fish,
• disk,
• lolly,
• alcohol,
• ball,
• bottom,
• law,
• pine,
• subject,
• veg,
• layer,
• papers,
• particle,
• gemstone,
• crime,
• quartz,
• ferrite,
• vehicle,
• ground,
• wire,
• exercise,
• biscuit,
• service,
• medium,
• item,
• aspect,
• container,
• input,
• abrasive,
• compound,
• grass,
• room,
• fiber,
• hardwood,
• flooring,
• disturbance,
• variable,
• pipe,
• edge,
• pad,
• commitment,
• sector,
• cracker,
• content,
• mineral,
• essence,
• info,
• problem,
• seed,
• matter,
• insulator,
• labor,
• nut,
• track,
• feed,
• residue,
• device,
• identification,
• armour,
• yarn,
• works,
• sport,
• obstruction,
• fixing,
• waste,
• pavement,
• commodity,
• reference,
• panel,
• portion,
• condition,
• connection,
• adhesive,
• outcome,
• ligand,
• fat,
• nonmetal,
• plate,
• stain,
• appliance,
• ingredient,
• fruit,
• glass,
• component,
• mast,
• investment,
• clay,
• foodstuff,
• issue,
• butter,
• tick,
• aggregate,
• measure,
• data,
• incentive,
• steel,
• elastomer,
• filler,
• wax,
• format,
• meat,
• tag,
• lure,
• assets,
• mode,
• access,
• detector,
• fuel,
• infrastructure,
• conveyance,
• study,
• acceleration,
• deposit,
• coating,
• lump,
• institution,
• substance,
• starches,
• impediment,
• animal,
• capital,
• acid,
• attribute,
• devices,
• floor,
• oxide,
• grain,
• carbon,
• matrix,
• article,
• characteristic,
• hydrocarbon,
• chemical,
• water,
• tree,
• dog,
• rubber,
• work,
• training,
• confectionery,
• block,
• output,
• possession,
• fabric,
• vegetable,
• product,
• formation,
• ware,
• maple,
• wedge,
• protein,
• spice,
• pen,
• washer,
• furniture,
• rule,
• soil,
• fastener,
• unit,
• original,
• constituent,
• time,
• benefit,
• notebook,
• piece,
• shell,
• sheet,
• beverage,
• professional,
• powder,
• grit,
• drive,
• implement,
• sweet,
• times,
• workout,
• equipment,
• thing,
• utensil,
• key,
• ion,
• indicator,
• cover,
• evidence,
• body,
• drink,
• fastening,
• procedure,
• skill,
• fibre,
• information,
• control,
• fault,
• system,
• insect,
• sausage,
• target,
• solid,
• job,
• epithelium,
• structure,
• bottle,
• ip,
• bait,
• science,
• use,
• mask,
• laser,
• projectile,