Transcaucasian is valid Scrabble Word

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

Definitions for TRANSCAUCASIAN in dictionary:

How to use TRANSCAUCASIAN in a sentence

Find what other words can be done using letters: "transcaucasian"
https://scrabble-word.com/finder/transcaucasian
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