From 29,663 11-letter words in the dictionary, our WordFinder extracted 516 that end in ATION, and you can see them all on this page. All of these words have high value in Scrabble and will get you 15.5 points on average, with OZONIZATION having the highest value with 29 points.
If ATION is the ending phrase you want to incorporate into your word but want to go beyond just 11-letter words, we have a list of all words ending in ATION from the dictionary for you.
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For Scrabble and other word games, if you need to form an 11-letter words ending in ATION, you should know that most of these words start with the letter C, as 61 out of 516 from this group start with this letter.