* Sexennial: Occurring every six years (e.g., a sexennial census).
* Sextant: A navigational instrument used to measure angles (originally based on a sixth of a circle).
* Sextet: A group of six musicians or singers.
* Sextile: In astrology, an aspect in which two planets are 60 degrees apart.
* Sexton: A person who looks after a church, especially the churchyard. (The origin of this word is uncertain, but possibly connected to the word "sex" in the sense of a "division" or "section".)
Please note that while the word "sex" (referring to gender) has its roots in Latin, it doesn't directly stem from "sex" meaning "six". It comes from the Latin "sexus", meaning "gender" or "sex".