Tenemental is an unusual word, meaning "related to a tenement", which is a type of multi-unit housing. Synonyms for tenemental might include words like "apartment complex", "residential building", or "multi-family dwelling". Other related synonyms might include "low-income housing", "public housing", or "affordable housing", depending on the context and the specific connotations of the word. In a more positive context, synonyms for tenemental might include words like "urban living", "mixed-use development", or "community housing", all of which emphasize the potential benefits of living in a multi-unit dwelling in a vibrant urban environment.