Modifiers matching anaesthetic:

• analgesic,
• neutral,
• volatile,
• topical,
• local,
• crude,
• powerful,
• new,
• victorian,
• general,
• natural,
• common,
• traditional,
• cationic,
• liquid,
• potent,
• ordinary,
• diverse,
• important,
• gaseous,
• flammable,

Simple categories matching gaseous:

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