"Motion" itself is a root word, meaning "the act or process of moving." It can be used as a noun, verb, or adjective.
Some words derived from "motion" use suffixes, but they don't directly add to the word "motion" itself:
* -less: motionless (without motion)
* -ary: motionary (relating to motion)
* -al: motional (pertaining to motion)
* -er: motioner (one who makes a motion)
It's important to note that these suffixes are applied to related words derived from "motion," not to the word "motion" itself.