Septangular is a unique word that is not commonly used in everyday language. However, there are several synonyms that can be used to describe the same shape or object. One such synonym is heptagonal, which refers to a polygon with seven sides and angles. Another similar term is septangle, which is simply another way of saying a seven-sided figure. Additionally, the term septagon can be used to describe a heptagonal shape, particularly in the field of geometry. Other terms that may be used as synonyms for septangular include seven-sided, seven-angular, and heptagon-shaped. These terms can be used interchangeably to describe the same shape, depending on the context and preference of the speaker or writer.