The term "tobira family" refers to a Japanese term that translates to "door family." While there may not be any direct synonyms for this term, there are some related terms that can be used to describe it. For example, the word "tobira" may be used interchangeably with "door," while "family" might be replaced with "clan" or "tribe." In some cases, the phrase "tobira descendants" may also be used to refer to those who are related to or descended from the original "tobira family" members. Overall, the term "tobira family" is relatively unique and may not have precise synonyms, but related terms can be used to convey similar meanings.