Category Nuances for null:

• metal,
• important,
• exogenous,
• conductive,
• ferromagnetic,
• organic,
• agricultural,
• catalytic,
• renewable,
• medium,
• inorganic,
• covalent,
• magnetic,
• abundant,
• atmospheric,
• cubic,
• hybrid,
• small,
• elemental,
• heavy,
• refractory,
• financial,
• gaseous,
• harmless,
• sustainable,
• harmful,
• strategic,
• fissionable,
• toxic,
• particular,
• soluble,
• safe,
• hydrophilic,
• environmental,
• individual,
• chemical,
• common,
• innocuous,
• noxious,
• smaller,
• antiferromagnetic,
• secondary,
• liquid,
• undesirable,
• atomic,
• cheaper,
• ductile,
• polyvalent,
• physical,
• valuable,
• dense,
• major,
• natural,
• heavier,
• additional,
• costly,
• undesired,
• oxidizable,
• size,
• outside,
• regulated,
• minor,
• unusual,
• diamagnetic,
• layer,
• nervous,
• intelligent,
• thermal,
• fine,
• dissolved,
• binding,
• electropositive,
• relevant,
• precious,
• reactive,
• carbonaceous,
• key,
• static,
• damaging,
• iron,
• optical,
• cationic,
• terrestrial,
• paramagnetic,
• unwanted,
• interfering,
• poisonous,
• single,
• nontoxic,
• acid,
• significant,
• pure,
• nonpolar,
• fluid,
• warming,
• global,
• frozen,
• polycrystalline,
• useful,
• oxidized,
• anthropogenic,
• sensitive,
• unsaturated,
• alternative,
• auxiliary,
• detrimental,
• volatile,
• ferrous,
• simple,
• native,
• lighter,
• dispersive,
• pharmacologic,
• inexpensive,
• seasonal,
• mixed,
• bivalent,
• raw,
• molten,
• asymmetric,
• airborne,
• bad,
• dry,
• central,
• blasting,
• new,
• molecular,
• foreign,
• centralized,
• critical,
• divalent,
• nonmagnetic,
• ii,
• base,
• supercritical,
• isotropic,
• expensive,
• amorphous,
• ordinary,
• typical,
• solid,
• carcinogenic,
• real,
• noble,
• combustible,
• electrochemical,
• respiratory,
• acidic,
• addictive,
• active,
• bound,
• controlled,
• complex,
• inert,
• benign,
• electronegative,
• basic,
• particulate,
• aggressive,
• hydrophobic,
• stable,
• rare,
• metallic,
• insoluble,
• hard,
• hazardous,
• potent,
• essential,
• allergenic,
• residual,
• crystalline,
• functional,
• soft,
• buoyant,

Simple Categories for null:

• neutral,
• material,
• metal,
• anhydride,
• plant,
• waste,
• item,
• group,
• animal,
• activator,
• compound,
• catalyst,
• solute,
• fraction,
• component,
• relationship,
• tm,
• carbonyl,
• chemical,
• complex,
• volatile,
• control,
• acid,
• system,
• nature,
• fm,
• radical,
• carrier,
• thing,
• residue,
• sulfide,
• substance,
• measure,
• adduct,
• contaminant,
• substrate,
• salt,
• person,
• hydroxide,
• sulphide,
• atom,
• chloride,
• agent,
• change,
• reactant,
• solid,
• affinity,
• buffer,
• intermediate,
• conductor,
• matter,
• unit,
• location,
• constituent,
• particle,
• carbon,
• mineral,
• grouping,
• amount,
• element,
• oxide,
• mixture,
• fluid,
• monomer,
• quantity,
• contamination,
• precursor,
• silicide,