Heptades is a term that refers to a set of seven things or entities that share a common trait or relationship. There are several alternative synonyms that can be used to describe this concept, including septet, septuplet, heptad, and sevenfold. These words all convey the same meaning as heptades and can be used interchangeably to describe a group of seven related objects or ideas. Some additional synonyms for heptades include septennial, septiform, and septenary, which refer to things that occur or are organized in seven-year cycles, have seven forms or aspects, or are characterized by the number seven.