What are some words end with the suffix action?

While "action" is a word in its own right, it's not commonly used as a suffix. You might be thinking of "-ation," which *is* a common suffix.

Here are some words that end in "-ation":

Common words:

* Action

* Education

* Motivation

* Conversation

* Celebration

* Application

* Information

* Organization

Less common words:

* Acclimation

* Assimilation

* Commemoration

* Demarcation

* Emancipation

* Exfoliation

* Incarnation

* Legitimation

* Proliferation

* Verification

Let me know if you'd like more words ending in "-ation" or if you were thinking of a different suffix!