(n.) One who, or that which, neutralizes; that which destroys, disguises, or renders inert the peculiar properties of a body.

acid acidity agent alkali alkalinity alloisomer anion antacid antidote atom base biochemical buffer cation chemical chemical element chromoisomer compound copolymer counteractant counteractive counteragent counterirritant dimer element heavy chemicals high polymer homopolymer hydracid inorganic chemical ion isomer macromolecule metamer molecule monomer nonacid nullifier offset organic chemical oxyacid polymer preventative preventive prophylactic pseudoisomer radical reagent remedy sulfacid trimer