Tripier is valid Scrabble Word

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

Definitions for TRIPIER in dictionary:

Words related to TRIPIER

tripe7 tripey11 tripy10
Find what other words can be done using letters: "tripier"
https://scrabble-word.com/finder/tripier
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