Here are some words ending in "-ation":
* Action: the process of doing something
* Creation: the act of making something new
* Education: the process of learning and teaching
* Explanation: the process of making something clear
* Information: knowledge or facts
* Motivation: the reason for doing something
* Observation: the act of watching something carefully
* Preparation: the process of getting ready for something
* Presentation: the act of showing something to others
* Regulation: a rule or law
* Situation: a set of circumstances
* Transportation: the process of moving people or goods
Let me know if you have any other words you'd like help with!