Sideless is valid Scrabble Word

Is sideless a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is sideless valid Words with Friends?
Words with Friends YES

Definitions for SIDELESS in dictionary:

How to use SIDELESS in a sentence

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