Modifiers matching ligand:

• nonsteroidal,
• external,
• base,
• hydrophobic,
• natural,
• simple,
• acidic,
• exogenous,
• hydrophilic,
• bound,
• relevant,
• potent,
• strong,
• nonmetal,
• psychoactive,
• complex,
• common,
• ancillary,
• charged,
• inorganic,
• physiologic,
• ionic,
• extracellular,
• important,
• weak,
• organic,
• small,
• cellular,
• active,
• lipophilic,
• physiological,
• environmental,
• complementary,
• functional,
• biological,
• psychedelic,
• hard,
• additional,
• neutral,
• synthetic,
• cationic,
• binding,
• axial,
• anionic,
• soft,
• endogenous,
• metal,
• atomic,
• uncharged,
• polar,

Simple categories matching exogenous:

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