Modifiers matching fuel:

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

Simple categories matching vegetative:

• foodstuff,
• matter,
• material,
• waste,
• tissue,
• trait,
• property,
• food,
• variable,
• source,
• part,
• community,
• residue,
• area,
• process,
• fuel,
• measure,
• flour,
• covering,
• category,
• growth,
• feature,
• substance,
• structure,
• improvement,
• activity,
• group,
• plant,
• character,
• organ,
• note,
• means,
• cover,