Modifiers matching gas:

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

Simple categories matching neutral:

• weave,
• solute,
• location,
• polysaccharide,
• emotion,
• particle,
• color,
• person,
• atom,
• creature,
• stimulus,
• institution,
• drug,
• gas,
• unit,
• risk,
• monosaccharide,
• disaccharide,
• residue,
• ground,
• language,
• hadron,
• resin,
• sugar,
• information,
• compound,
• anaesthetic,
• substance,
• environment,
• cue,
• amide,
• clothing,
• party,
• fat,
• hydrocarbon,
• flavor,
• place,
• entity,
• core,
• phospholipid,
• sound,
• monomer,
• surface,
• term,
• radiation,
• item,
• hexose,
• group,
• cause,
• solution,
• scent,
• fragrance,
• enzyme,
• metal,
• chloride,
• complex,
• proteinase,
• carrier,
• pharmaceutical,
• agent,
• object,
• sterol,
• lipid,
• issue,
• fluid,
• path,
• fermion,
• individual,
• tint,
• beverage,
• topic,
• lepton,
• point,
• beam,
• territory,
• fabric,
• liquid,
• fraction,
• thought,
• thing,
• cleaner,
• ligand,
• character,
• light,
• lexis,
• quality,
• element,
• filter,
• oil,
• shade,
• dish,
• medium,
• substrate,
• species,
• constituent,
• material,
• solvent,
• salt,
• building,
• organization,
• organisation,
• activity,
• diaphragm,
• tea,
• zone,
• system,
• mutation,
• adult,
• space,
• source,
• container,
• carbohydrate,
• polymer,
• structure,
• macromolecule,
• country,
• component,
• body,
• drink,
• atmosphere,
• cleaning,
• area,
• precursor,
• site,
• expert,
• saccharide,
• odor,
• acid,
• toy,
• food,
• colouring,
• grounds,
• sulfate,
• agency,
• screen,
• steroid,
• molecule,
• ingredient,
• position,