Other denominations do not have tags for each individual group under the main heading (e.g. all Lutherans, whether ELCA, WELS, NALC, LCMC, LCMS, etc. are all under lutheranism). Also, each of these proposed synonyms have only had one question for each in the past 12 months. Making them synonyms of baptist will make them easier to find. I would make the proposals myself but it won't let me as I don't have rep in these tags.