Tumulosity is valid Scrabble Word

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

Definitions for TUMULOSITY in dictionary:

Words related to TUMULOSITY

tumulose10 tumulosities14

Similar words containing TUMULOS without suffix ity

tumulose10 tumulosities14
Find what other words can be done using letters: "tumulosity"
https://scrabble-word.com/finder/tumulosity
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