Underbuild is valid Scrabble Word

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

Definitions for UNDERBUILD in dictionary:

Words related to UNDERBUILD

underbuilding18 underbuilds15 underbuilt13

Words that contain UNDERBUILD

underbuilds15 underbuilder16 underbuilders17 underbuilding18
Find what other words can be done using letters: "underbuild"
https://scrabble-word.com/finder/underbuild
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