Modifiers matching gas:

• electropositive,
• polar,
• rare,
• inert,
• diatomic,
• combustible,
• noble,
• liquefied,
• pure,
• metabolic,
• inflammable,
• corrosive,
• supporting,
• manufactured,
• elemental,
• industrial,
• useful,
• flammable,
• extraneous,
• noxious,
• malodorous,
• diffusing,
• under,
• frozen,
• unique,
• relativistic,
• mobile,
• explosive,
• propellant,
• refrigerant,
• toxic,
• active,
• ambient,
• luminous,
• atomic,
• saturated,
• undesirable,
• hydrophilic,
• organic,
• nontoxic,
• harmful,
• particular,
• inexpensive,
• metal,
• available,
• chemical,
• abundant,
• real,
• acidic,
• conductive,
• valuable,
• starting,
• heavy,
• foreign,
• technical,
• nonpolar,
• popular,
• number,
• divalent,
• compressible,
• supportive,
• rarefied,
• hot,
• transparent,
• critical,
• molecular,
• expensive,
• absorptive,
• poisonous,
• insoluble,
• vital,
• surrounding,
• reactive,
• cryogenic,
• invisible,
• consumable,
• environmental,
• aggressive,
• scientific,
• fast,
• tenuous,
• volatile,
• dusty,
• incombustible,
• desirable,
• familiar,
• paramagnetic,
• passive,
• raw,
• medium,
• refrigerated,
• residual,
• vesicant,
• anthropogenic,
• indoor,
• minor,
• damaging,
• nonflammable,
• single,
• heated,
• weak,
• interfering,
• noncombustible,
• medical,
• synthetic,
• small,
• permanent,
• dense,
• hydrophobic,
• airborne,
• natural,
• biogenic,
• supplemental,
• malign,
• acid,
• sulfurous,
• warming,
• basic,
• monatomic,
• carcinogenic,
• off,
• important,
• unstable,
• dry,
• suffocating,
• harmless,
• heavier,
• special,
• neutral,
• out,
• inorganic,
• strong,
• oxidative,
• dilute,
• radioactive,
• electronegative,
• model,
• protective,
• alkaline,
• artificial,
• deadly,
• incoming,
• suitable,
• carbonaceous,
• oxidizable,
• classical,
• key,
• beneficial,
• supercritical,
• complex,
• mixed,
• deleterious,
• detrimental,
• simple,
• edible,
• buoyant,
• convenient,
• ignitable,
• auxiliary,
• standard,
• common,
• innocuous,
• liquid,
• atmospheric,
• floating,
• unsaturated,
• unwanted,
• external,
• lighter,
• thin,
• obnoxious,
• essential,
• hazardous,
• clean,
• base,
• benign,
• fixed,
• moving,
• separate,
• stable,
• faster,
• lightweight,
• relevant,
• impure,
• warm,
• dangerous,
• secondary,
• cheap,
• working,
• soluble,
• ionic,
• mental,
• commercial,
• respiratory,
• ordinary,
• medicinal,
• light,
• dissolved,
• additional,
• individual,
• injurious,
• diamagnetic,
• automotive,
• rich,
• irritating,
• liquified,
• monoatomic,
• safe,
• major,
• controlled,
• compressed,
• identifiable,
• miscellaneous,
• traditional,
• cold,
• conventional,

Simple categories matching expensive:

• item,
• substrate,
• material,
• constituent,
• facility,
• clothes,
• mailing,
• sounder,
• metal,
• activity,
• equipment,
• work,
• wood,
• paraphernalia,
• mammal,
• bridge,
• trip,
• vegetable,
• ware,
• staff,
• merchandise,
• package,
• disease,
• illness,
• chemical,
• fabric,
• rug,
• polymer,
• ornament,
• thing,
• delicacy,
• part,
• device,
• food,
• boutique,
• fibre,
• security,
• flooring,
• vehicle,
• practice,
• instrument,
• nightspot,
• horn,
• installation,
• footwear,
• computer,
• herb,
• carpet,
• modality,
• fixture,
• glass,
• ingredient,
• sensor,
• liquid,
• pharmaceutical,
• problem,
• condition,
• therapy,
• service,
• flower,
• protein,
• alcohol,
• livestock,
• jewel,
• module,
• fish,
• opal,
• gem,
• bike,
• artefact,
• elements,
• drug,
• flavouring,
• coating,
• spice,
• container,
• issue,
• mineral,
• variety,
• care,
• assay,
• shellfish,
• element,
• building,
• process,
• antibiotic,
• medicine,
• accoutrement,
• weapon,
• frill,
• stuff,
• rubber,
• condiment,
• roller,
• chicken,
• machinery,
• repair,
• boat,
• intervention,
• content,
• essential,
• location,
• fuel,
• endeavor,
• antidepressant,
• housing,
• course,
• brush,
• machine,
• arrangement,
• feature,
• animal,
• fertilizer,
• plant,
• experiment,
• mission,
• publication,
• behaviour,
• medication,
• pearl,
• restaurant,
• meal,
• extra,
• property,
• abrasive,
• club,
• ink,
• generator,
• instrumentation,
• speaker,
• measure,
• outing,
• furnishing,
• change,
• defense,
• wine,
• fluid,
• commodity,
• sector,
• loan,
• essence,
• meat,
• upkeep,
• garment,
• workstation,
• beverage,
• cereal,
• solution,
• layer,
• program,
• projector,
• software,
• glassware,
• foodstuff,
• medium,
• gasket,
• resource,
• kimono,
• shop,
• surface,
• tool,
• substance,
• conductor,
• cofactor,
• fiber,
• car,
• packaging,
• programming,
• method,
• set,
• softwood,
• polysaccharide,
• shape,
• silicon,
• sport,
• improvement,
• hardwood,
• catalyst,
• testing,
• clothing,
• endeavour,
• horse,
• assistance,
• textile,
• jewelry,
• furniture,
• grain,
• control,
• hospital,
• coolant,
• organs,
• event,
• possession,
• investigation,
• lock,
• gear,
• institution,
• operations,
• shed,
• hotel,
• room,
• mouse,
• gas,
• study,
• assets,
• examination,
• transport,
• school,
• tissue,
• stone,
• vinegar,
• antiquity,
• works,
• management,
• os,
• decoration,
• sweetener,
• steak,
• debt,
• appliance,
• species,
• agent,
• souvenir,
• arts,
• shopping,
• accessory,
• treatment,
• filler,
• article,
• penalty,
• compound,
• seafood,
• discipline,
• sulfide,
• perishable,
• analysis,
• drink,
• devices,
• fruit,
• protection,
• apparatus,
• cloth,
• resin,
• camera,
• oil,
• research,
• country,
• peripheral,
• creature,
• land,
• technology,
• means,
• product,
• object,
• input,
• component,
• task,
• hardware,
• area,
• structure,
• aggregate,
• procedure,
• gadget,
• system,
• expert,
• fruitwood,
• vessel,
• mechanism,
• test,
• ceremony,
• undertaking,
• pastime,
• unit,
• option,
• medicament,
• benefit,
• tubing,
• form,
• wax,
• function,
• clutch,
• gemstone,
• paving,
• platform,
• alloy,
• narcotic,
• toy,
• serum,
• feed,
• coenzyme,