natural process vs ion exchange

Other hyponyms of natural process include radiation, absorption, acidification, adiabatic process, aeration, antiredeposition, capture, capture, centrifugation, chemical action, chemical change, chemical process, chromatography, concretion, condensation, convection, clotting, coagulation, curdling, decay, demagnetisation, demagnetization, desorption, diffusion, disintegration, dissolution, distillation, distillment, drift, effervescence, cataphoresis, dielectrolysis, electrophoresis, ionophoresis, ecesis, establishment, extinction, extraction, feedback, filtration, flocculation, flow, formation, fossilisation, fossilization, geologic process, geological process, curing, hardening, set, solidification, solidifying, inactivation, ionisation, ionization, leach, leaching, magnetic induction, magnetisation, magnetization, materialisation, materialization, nuclear reaction, opacification, oscillation, oxygenation, pair creation, pair formation, pair production, phase change, phase transition, physical change, state change, precession of the equinoxes, release, saltation, scattering, sericulture, sink, soak, soakage, soaking, softening, sorption, source, rigidification, rigidifying, stiffening, stimulation, ecological succession, succession, natural selection, selection, survival, survival of the fittest, synergism, synergy, temperature change, transduction, transpiration, vitrification.