The root of the words missionary and missile?

You're right to notice a connection! While seemingly unrelated, both words share the same Latin root: "mittere"

* "Missionary" comes from the Latin "missionarius," meaning "one who is sent." This stems from "mittere," which means "to send."

* "Missile" comes from the Latin "missilis," meaning "capable of being thrown." This also comes from "mittere," meaning "to send" or "to throw."

So, both "missionary" and "missile" fundamentally relate to the act of "sending" something, whether it be a person on a spiritual mission or a projectile weapon.