Unobservance is valid Scrabble Word

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

Definitions for UNOBSERVANCE in dictionary:

Words related to UNOBSERVANCE

unobservances20

Words that contain UNOBSERVANCE

unobservances20
Find what other words can be done using letters: "unobservance"
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