Ninjitsus is valid Scrabble Word

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

Definitions for NINJITSUS in dictionary:

Words related to NINJITSUS

ninjitsu15

Similar words containing NINJITSU without suffix s

ninjitsu15
Find what other words can be done using letters: "ninjitsus"
https://scrabble-word.com/finder/ninjitsus
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