Modifiers matching fuel:

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

Simple categories matching vehicular:

• service,
• traffic,
• system,
• equipment,
• unit,
• activity,
• structure,
• part,
• crime,
• application,
• surface,
• accident,
• subject,
• transport,
• motion,
• language,
• route,
• convoy,
• weaponry,
• area,
• enclosure,
• fuel,
• characteristic,
• information,
• event,