Irrigational is valid Scrabble Word

Is irrigational a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List NO
Collins Scrabble Words YES
Is irrigational valid Words with Friends?
Words with Friends NO

Definitions for IRRIGATIONAL in dictionary:

Similar words containing RIGATION without suffix al and without prefix ir

irrigation11 irrigations12 subirrigation16 subirrigations17
Find what other words can be done using letters: "irrigational"
https://scrabble-word.com/finder/irrigational
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