Septilateral is a term used to describe a shape or object that has seven sides or edges. However, there are a few alternative words that can be used interchangeably with septilateral. One such word is heptagonal, which is often used in geometric and mathematical terminology. Other similar terms include seven-sided, septangle, and septangular. The word septenary can also be used to describe a group or set of seven, although it typically does not refer specifically to a shape or object. While these words may not be as commonly used as septilateral, they can help to add variety and precision to language when describing shapes and objects with seven sides.