When it comes to synonyms for a "member of the board of aldermen," there can be a few options available. Some of these synonyms include "city council member," "town council member," or simply "council member." Another option may be to use the specific title of the board, such as "board of selectmen member" or "township trustee member." In some cases, "alderperson" or "alderwoman" may also be used instead of "alderman." Regardless of the specific synonym used, the individual in question is likely a public official who helps govern a local community or municipality.