Submaximally is valid Scrabble Word

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

Definitions for SUBMAXIMALLY in dictionary:

Similar words containing MAXIMAL without suffix ly and without prefix sub

maximal18 maximals19 maximally23 maximalist21 submaximal23 maximalists22
Find what other words can be done using letters: "submaximally"
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