Heptad is a technical term that refers to a group of seven related things. There are several synonyms for this word that can be used to describe the same concept. One synonym for heptad is septet, which is often used in music to describe a group of seven musicians or singers performing together. Another synonym is sevenfold, which emphasizes the number seven and its significance in religious or spiritual contexts. The word heptagon is also a synonym for heptad, referring to a polygon with seven sides. Other synonyms for heptad include seven-membered, seven-part, and sevenfolded. No matter which term is used, they all convey the idea of a group of seven that is related in some way.