Category Nuances for methane:

• combustible,
• volatile,
• dry,
• liquified,
• complex,
• organic,
• molten,
• geological,
• carbonaceous,
• light,
• simple,
• inert,
• binary,
• common,
• kinetic,
• atmospheric,
• aggressive,
• unregulated,
• nonpolar,
• explosive,
• working,
• small,
• invisible,
• toxic,
• safe,
• flammable,
• cheap,
• corrosive,
• covalent,
• planetary,
• abundant,
• inflammable,
• polyatomic,
• solid,
• polar,
• frozen,
• important,
• malign,
• exotic,
• unstable,
• cryogenic,
• soluble,
• compressible,
• neutral,
• supercritical,
• harmful,
• primary,
• dangerous,
• airborne,
• key,
• rich,
• ordinary,
• new,
• major,
• intermediate,
• relevant,
• environmental,
• individual,
• level,
• industrial,
• carcinogenic,
• natural,
• cold,
• deadly,
• permanent,
• tertiary,
• catastrophic,
• lower,
• real,
• solar,
• additional,
• deleterious,
• useful,
• metabolic,
• microbial,
• harmless,
• smaller,
• liquefied,
• secondary,
• damaging,
• insoluble,
• incoming,
• dense,
• special,
• irritating,
• expensive,
• unsaturated,
• poisonous,
• compressed,
• standard,
• atomic,
• saturated,
• guest,
• chemical,
• reactive,
• particular,
• interfering,
• hydrophobic,
• valuable,
• heavy,
• rare,
• typical,
• base,
• clean,
• desirable,
• foreign,
• particulate,
• exempt,
• undesirable,
• auxiliary,
• dilute,
• noxious,
• model,
• warming,
• heavier,
• available,
• sensitive,
• inexpensive,
• active,
• similar,
• impure,
• innocuous,
• minor,
• residual,
• gaseous,
• obnoxious,
• raw,
• vital,
• fluid,
• endogenous,
• anthropogenic,
• nontoxic,
• fixed,
• molecular,
• inorganic,
• lighter,
• noble,
• hazardous,
• liquid,
• dissolved,
• aliphatic,
• weak,
• pure,
• stable,
• basic,
• mixed,

Simple Categories for methane:

• intermediate,
• hydrocarbon,
• change,
• system,
• gas,
• component,
• atom,
• contamination,
• substance,
• mixture,
• compound,
• constituent,
• precursor,
• waste,
• substrate,
• paraffin,
• fluid,
• fraction,
• alkane,
• chemical,
• material,
• contaminant,
• solid,
• volatile,
• reactant,
• liquid,
• mineral,
• rock,
• explosive,
• cause,
• matter,
• particle,
• air,
• derivative,
• fumes,
• residue,
• carrier,
• solute,
• atmosphere,
• acid,