Monotoned is valid Scrabble Word

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

Definitions for MONOTONED in dictionary:

Words related to MONOTONED

monotone10
Find what other words can be done using letters: "monotoned"
https://scrabble-word.com/finder/monotoned
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