Modifiers matching fuel:

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

Simple categories matching refined:

• mineral,
• food,
• metal,
• works,
• pasta,
• life,
• pastime,
• starches,
• hydrocarbon,
• carbohydrate,
• grain,
• fuel,
• area,
• substance,
• steel,
• work,
• starch,
• resource,
• material,
• sugar,
• product,
• drink,
• attainment,
• structure,
• commodity,
• cereal,
• flour,
• arts,
• item,
• oil,
• foodstuff,
• data,
• rice,
• form,
• sweetener,
• activity,
• potato,
• sweet,
• copper,
• substrate,
• chemical,
• horse,
• feature,
• furnishing,
• fabric,
• ingredient,
• fat,
• petroleum,