Modifiers matching fuel:

• biological,
• separate,
• liquid,
• solid,
• special,
• nonpolar,
• organic,
• volatile,
• metabolic,
• combustible,
• carbonaceous,
• thinner,
• useful,
• common,
• domestic,
• inhomogeneous,
• normal,
• commonplace,
• down,
• diverse,
• destructive,
• discrete,
• light,
• conventional,
• traditional,
• taxable,
• real,
• convenient,
• nonwoody,
• valuable,
• medical,
• gaseous,
• appropriate,
• familiar,
• rich,
• natural,
• exotic,
• primary,
• dry,
• future,
• consumable,
• ordinary,
• secondary,
• advanced,
• compressed,
• fluid,
• smaller,
• dirty,
• difficult,
• supplemental,
• refined,
• friendly,
• residual,
• available,
• safe,
• starting,
• loose,
• environmental,
• fibrous,
• homogeneous,
• unprocessed,
• pure,
• renewable,
• granular,
• heavier,
• up,
• odd,
• major,
• precious,
• harmful,
• intermediate,
• raw,
• actual,
• inflammable,
• needed,
• mundane,
• basic,
• regular,
• strategic,
• nuclear,
• cheap,
• lighter,
• practical,
• dirtier,
• specialized,
• toxic,
• porous,
• competitive,
• automotive,
• suitable,
• fine,
• abundant,
• several,
• sustainable,
• efficient,
• dangerous,
• commercial,
• corrosive,
• innovative,
• auxiliary,
• nonrenewable,
• desirable,
• beneficial,
• oxidizable,
• single,
• standard,
• sensitive,
• indoor,
• alternative,
• reactive,
• off,
• compressible,
• soluble,
• thermal,
• heavy,
• abrasive,
• physiological,
• old,
• unconventional,
• vegetative,
• benign,
• residential,
• dead,
• chemical,
• vehicular,
• motor,
• expensive,
• cleaner,
• vaporizable,
• synthetic,
• small,
• usable,
• unwanted,
• indigenous,
• main,
• supplementary,
• flammable,
• ignitable,
• essential,
• industrial,
• typical,
• possible,
• explosive,
• complex,
• costly,
• dense,
• inexpensive,
• modern,
• macromolecular,
• wet,
• extra,
• supporting,
• cryogenic,
• powdered,
• important,
• particular,
• artificial,
• uniform,
• key,
• damaging,
• individual,
• foreign,
• manufactured,
• hard,
• hazardous,
• particulate,
• base,
• herbaceous,
• clean,
• propellant,
• local,
• finished,
• new,
• simple,
• direct,
• unhealthy,
• miscellaneous,
• technical,

Simple categories matching combustible:

• gas,
• vegetation,
• waste,
• deposit,
• object,
• compound,
• item,
• fabric,
• metal,
• fumes,
• component,
• powder,
• equipment,
• product,
• substance,
• decoration,
• fluid,
• material,
• container,
• solvent,
• wall,
• debris,
• solid,
• mixture,
• foil,
• oil,
• fuel,
• mineral,
• filament,
• structure,
• construction,
• hydrocarbon,
• nature,
• rock,
• vehicle,
• matter,
• fraction,
• residue,
• garbage,
• land,
• sheet,
• particle,
• adhesive,
• contaminant,
• chemical,
• surface,
• scrap,
• dust,
• wax,
• space,
• article,
• volatile,
• fiber,
• liquid,