Subnotebooks is valid Scrabble Word

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

Definitions for SUBNOTEBOOKS in dictionary:

Similar words containing NOTEBOOK without suffix s and without prefix sub

notebook14 notebooks15 subnotebook19
Find what other words can be done using letters: "subnotebooks"
https://scrabble-word.com/finder/subnotebooks
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