Unproposed is valid Scrabble Word

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

Definitions for UNPROPOSED in dictionary:

Similar words containing PROPOS without suffix ed and without prefix un

apropos11 propose11 proposal12 proposed13 proposer12 proposes12 proposals13 proposers13 proposing14 proposita13 propositi13 malapropos16 proposable16 propositae14 propositus14 proposition15 propositions16 propositional17 propositioned18 propositioning19 counterproposal21 propositionally22 counterproposals22
Find what other words can be done using letters: "unproposed"
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