Modifiers matching ligand:

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

Simple categories matching atomic:

• material,
• substance,
• matter,
• thing,
• system,
• isotope,
• signal,
• particle,
• gas,
• force,
• operations,
• theory,
• vapor,
• quantity,
• property,
• event,
• entity,
• structure,
• core,
• information,
• motion,
• group,
• composition,
• fluid,
• liquid,
• process,
• number,
• hydrogen,
• aggregate,
• grouping,
• phenomenon,
• unit,
• surface,
• imperfection,
• transport,
• agent,
• constituent,
• distribution,
• volume,
• change,
• level,
• crystal,
• value,
• oxygen,
• metal,
• control,
• cluster,
• field,
• instruction,
• target,
• solid,
• atom,
• object,
• parameter,
• mass,
• layer,
• dimension,
• medium,
• values,
• interaction,
• position,
• ligand,
• feature,
• physics,
• attribute,
• domain,
• resonance,
• bond,
• research,
• weight,
• solute,
• element,
• component,
• migration,
• packing,