Modifiers matching precursor:

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

Simple categories matching metabolic:

• process,
• excretion,
• disorder,
• poison,
• event,
• situation,
• phenomenon,
• control,
• condition,
• material,
• activity,
• disease,
• measure,
• cause,
• property,
• relation,
• organ,
• tissue,
• acid,
• waste,
• hormone,
• fuel,
• system,
• arthritis,
• acidosis,
• change,
• component,
• organs,
• constituent,
• sugar,
• derivative,
• abnormality,
• function,
• protein,
• precursor,
• product,
• state,
• demand,
• trait,
• inhibitor,
• upset,
• measurement,
• status,
• mineral,
• effect,
• syndrome,
• variable,
• substance,
• substrate,
• gas,
• signal,
• dormancy,
• action,
• mechanism,
• regulation,
• disturbance,
• marker,
• intermediate,
• activator,
• alteration,
• rate,
• complication,
• consequence,
• stress,
• response,
• illness,
• pathway,
• enzyme,
• reaction,
• interaction,
• requirement,
• compound,
• urolith,