I guess that the pronunciations should be noticeably different, something like /ˌju.ni.ənəˈzeɪʃn/ and /ˌʌn.aɪənɪˈzeɪʃn/. Please add the "living" pronunciations (maybe more than one for every case) to the article. --2A00:1370:8115:DEB9:A8E8:4CAB:BD3C:A8CA 21:50, 10 December 2021 (UTC)
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Sense: “(chemistry) The opposite of ionization.” Tagged by 86.145.58.222 (who changed it to “(chemistry) Synonym of deionization”) on 25 September (“Is this usage actually attested in chemistry?”), not listed. J3133 (talk) 07:01, 5 October 2022 (UTC)
RFV-passed This, that and the other (talk) 08:51, 14 November 2022 (UTC)