Undelighted is valid Scrabble Word

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

Definitions for UNDELIGHTED in dictionary:

Similar words containing DELIGHT without suffix ed and without prefix un

delight12 delights13 delighted15 delighter14 sidelight14 undelight14 delighters15 delightful18 delighting16 sidelights15 undelights15 delightedly20 delightless16 delightsome18 delightfully23 undelightful20 delightedness19 delightfulness22 delightednesses21 delightfulnesse23 delightfulnesses24
Find what other words can be done using letters: "undelighted"
https://scrabble-word.com/finder/undelighted
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