Modifiers matching activator:

• harsh,
• potent,
• physiologic,
• physiological,
• metal,
• natural,
• chemical,
• individual,
• biological,
• artificial,
• polar,
• alkaline,
• single,
• acid,
• salt,
• thermal,
• metabolic,
• exogenous,
• corrosive,
• pharmacological,
• pathological,
• auxiliary,
• immune,
• physical,
• neural,
• toxic,
• endogenous,
• cellular,

Simple categories matching polar:

• animal,
• compound,
• base,
• portion,
• group,
• organism,
• pesticide,
• contamination,
• metal,
• substance,
• fluid,
• derivative,
• solvent,
• intermediate,
• reactant,
• monomer,
• material,
• nutrient,
• ligand,
• radical,
• adhesive,
• oil,
• volatile,
• constituent,
• particle,
• surface,
• substrate,
• fauna,
• liquid,
• molecule,
• sorbent,
• polymer,
• impurity,
• bird,
• solute,
• dielectric,
• insulator,
• rubber,
• elastomer,
• contaminant,
• residue,
• atom,
• reagent,
• protein,
• metabolite,
• lipid,
• medium,
• diluent,
• mammal,
• gas,
• hormone,
• chemical,
• drug,
• plastic,
• region,
• structure,
• fiber,
• lubricant,
• activator,
• solid,
• macromolecule,
• bond,
• component,
• moiety,
• resin,
• unit,
• fraction,