There are many different synonyms that can be used in place of the term "single house". Some of the most common alternatives include "detached house", "stand-alone house", or simply "house". Other possibilities might include "single-family home", "bungalow", or "cottage". In some cases, the term "villa" might be used to describe a single house that is particularly luxurious or spacious. Ultimately, the best synonym to use will depend on the specific context and what type of connotations or associations are most appropriate for the particular situation. Regardless of the wording used, however, the basic idea of a single house as a standalone dwelling unit remains the same.