Modifiers matching gas:

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

Simple categories matching surrounding:

• structure,
• condition,
• tissue,
• point,
• muscle,
• school,
• heart,
• pregnancy,
• area,
• surface,
• water,
• clothing,
• material,
• lip,
• institution,
• community,
• medium,
• fixture,
• toy,
• object,
• equipment,
• control,
• constitution,
• works,
• organs,
• layer,
• insulation,
• service,
• country,
• air,
• building,
• earth,
• residence,
• plate,
• fluid,
• sector,
• mixture,
• site,
• addiction,
• background,
• foam,
• ocean,
• ion,
• man,
• hardware,
• electrode,
• source,
• domain,
• formation,
• brain,
• furniture,
• measure,
• sign,
• gas,
• obstruction,
• product,
• ceremony,
• town,
• city,
• light,
• stomach,
• case,
• design,
• company,
• death,
• portal,
• waste,
• enclosure,
• disorder,
• activity,
• joint,
• lake,
• device,
• noise,
• theme,
• component,
• lesion,
• energy,
• action,
• shop,
• system,
• process,
• field,
• atmosphere,
• thing,
• square,
• interaction,
• street,
• facility,
• section,
• feature,
• monument,
• contaminant,
• liquid,
• group,
• cable,
• landmark,
• offense,
• land,
• atom,
• unit,
• assembly,
• viscera,
• business,
• region,
• behavior,
• incident,
• opening,
• resource,
• basin,
• organ,
• uterus,
• liver,
• barrier,
• tourism,
• adjustment,
• home,
• event,
• information,
• detector,
• housing,
• food,
• mode,
• location,
• factory,
• space,
• vessel,
• peak,
• entity,
• fire,
• vegetation,
• quantity,
• circumstances,
• influence,
• environment,
• disease,
• cell,
• item,
• force,
• nasopharynx,
• image,
• spine,
• sampling,
• happening,
• substance,
• rock,
• article,
• artery,
• paving,
• employment,
• use,
• situation,
• market,
• planting,
• property,
• meeting,
• house,
• metal,
• installation,
• landscape,
• part,
• illness,
• plagiarism,
• set,
• growth,
• injury,
• delivery,
• work,
• culture,
• body,