Modifiers matching fuel:

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

Simple categories matching pure:

• material,
• metal,
• subject,
• idea,
• biology,
• substance,
• gas,
• alkane,
• compound,
• halogen,
• abstraction,
• drink,
• wool,
• placebo,
• hydrocarbon,
• nut,
• food,
• antipyretic,
• activity,
• disorder,
• fabrication,
• mind,
• matter,
• semiconductor,
• science,
• art,
• precipitate,
• form,
• tradition,
• quality,
• toxemia,
• butter,
• nutrient,
• complaint,
• spirits,
• carotenoid,
• notion,
• arts,
• fluid,
• worship,
• plant,
• salt,
• narcotic,
• mathematics,
• thing,
• commodity,
• source,
• fat,
• computation,
• atmosphere,
• chemical,
• elements,
• set,
• oxygen,
• product,
• opiate,
• entertainment,
• information,
• herb,
• carbon,
• liquid,
• connection,
• water,
• meat,
• extract,
• bread,
• molecule,
• chemistry,
• flavoring,
• translation,
• carbohydrate,
• preparation,
• odour,
• alcohol,
• fabric,
• agonist,
• fiber,
• solvent,
• nitride,
• oxide,
• powder,
• waste,
• dielectric,
• conductor,
• alpha-blocker,
• shape,
• gem,
• propellent,
• carbide,
• starch,
• drug,
• feeling,
• crystal,
• component,
• glass,
• disaccharide,
• study,
• fibre,
• essence,
• pt,
• color,
• ingredient,
• hydrogen,
• entity,
• concept,
• mineral,
• emotion,
• manure,
• sound,
• whimsy,
• solid,
• economics,
• enzyme,
• theory,
• silver,
• fruit,
• state,
• element,
• discipline,
• sugar,
• polysaccharide,
• analysis,
• cathode,
• phase,
• halide,
• necessity,
• oil,
• speech,
• motivation,
• sorbent,
• object,
• analgesic,
• substrate,
• surface,
• ore,
• proteinase,
• phenol,
• clay,
• smell,
• dish,
• fertilizer,
• system,
• soul,
• item,
• content,
• enjoyment,
• cluster,
• contaminant,
• fuel,
• protein,
• monosaccharide,
• textile,