Modifiers matching precursor:

• chemical,
• inorganic,
• explosive,
• color,
• immediate,
• acid,
• small,
• aromatic,
• exogenous,
• salt,
• key,
• simple,
• volatile,
• single,
• carbonaceous,
• essential,
• organic,
• important,
• neutral,
• molecular,
• alternative,
• weather,
• fatty,
• granular,
• charged,
• dietary,
• basic,
• active,
• stable,
• soluble,
• complex,
• ceramic,
• legal,
• liquid,
• possible,
• individual,
• elemental,
• common,
• biological,
• natural,
• additional,
• solid,
• controlled,
• biodegradable,
• genetic,
• starting,
• biochemical,
• smaller,
• polymeric,
• oxidizable,
• metal,
• fibrous,
• conventional,
• acidic,
• toxic,
• metabolic,
• available,
• gaseous,
• reactive,
• volcanic,
• synthetic,

Simple categories matching gaseous:

• fuel,
• hydrocarbon,
• object,
• olefin,
• salt,
• substrate,
• fumigant,
• contamination,
• alkane,
• fluid,
• compound,
• anaesthetic,
• chemical,
• substance,
• cyanide,
• flow,
• system,
• contaminant,
• pollutant,
• waste,
• odor,
• phenomenon,
• monomer,
• body,
• molecule,
• mass,
• acid,
• anesthetic,
• agent,
• precursor,
• alkyne,
• material,
• plasma,
• impurity,
• component,
• medium,
• constituent,
• buffer,
• form,
• mixture,
• reactant,
• matter,
• oxide,
• sulphide,
• state,
• carrier,
• atmosphere,