Modifiers matching ligand:

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

Simple categories matching ionic:

• substrate,
• waste,
• compound,
• contaminant,
• equilibrium,
• signal,
• use,
• metal,
• group,
• polymer,
• crystal,
• solid,
• component,
• azide,
• impurity,
• fluoride,
• gas,
• metabolite,
• tool,
• nitrate,
• mineral,
• particle,
• substance,
• substitution,
• chemical,
• liquid,
• oxide,
• material,
• surfactant,
• conductor,
• atom,
• oxalate,
• solution,
• solute,
• constituent,
• fluid,
• ligand,
• system,
• insulator,
• salt,
• drug,
• current,
• molecule,