Overproportioning is valid word

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

Definitions for OVERPROPORTIONING in dictionary:

Similar words containing OVERPROPORTION without suffix ing

overproportion21 overproportions22 overproportiona22 overproportione22 overproportioni22 overproportioned24 overproportionate24 overproportionately29
Find what other words can be done using letters: "overproportioning"
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