Modifiers matching precursor:

• inorganic,
• gaseous,
• chemical,
• neutral,
• oxidizable,
• individual,
• reactive,
• simple,
• liquid,
• possible,
• carbonaceous,
• volcanic,
• acid,
• polymeric,
• essential,
• genetic,
• color,
• aromatic,
• organic,
• dietary,
• granular,
• small,
• immediate,
• basic,
• conventional,
• active,
• smaller,
• metabolic,
• ceramic,
• fibrous,
• soluble,
• salt,
• toxic,
• additional,
• exogenous,
• available,
• elemental,
• legal,
• important,
• controlled,
• weather,
• biodegradable,
• synthetic,
• fatty,
• acidic,
• volatile,
• natural,
• single,
• starting,
• biological,
• solid,
• biochemical,
• explosive,
• metal,
• common,
• key,
• stable,
• complex,
• charged,
• molecular,
• alternative,

Simple categories matching exogenous:

• process,
• substance,
• acid,
• agent,
• particle,
• cofactor,
• system,
• control,
• component,
• substrate,
• authority,
• asthma,
• event,
• activator,
• compound,
• solute,
• material,
• base,
• proteinase,
• antigen,
• disturbance,
• occurrence,
• sterol,
• pathogen,
• inducer,
• glucocorticoid,
• hormone,
• cause,
• input,
• amine,
• signal,
• development,
• molecule,
• issue,
• contaminant,
• food,
• stimulus,
• phenomenon,
• enzyme,
• variable,
• acceptor,
• chemical,
• polysaccharide,
• steroid,
• hexose,
• cytokine,
• macromolecule,
• carbohydrate,
• intoxicant,
• catecholamine,
• carcinogen,
• condition,
• corticosteroid,
• source,
• metal,
• precursor,
• stimulant,
• poison,
• toxicant,
• demand,
• drug,
• phosphoprotein,
• change,
• toxin,
• estrogen,
• antioxidant,
• force,
• dna,
• protease,
• protein,
• ligand,
• factor,
• inhibitor,
• opiate,
• buffer,
• alteration,
• shock,
• sugar,
• amphetamine,
• retrovirus,
• opsonin,