Untactfully is valid Scrabble Word

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

Definitions for UNTACTFULLY in dictionary:

Similar words containing TACTFUL without suffix ly and without prefix un

tactful12 tactfully17 untactful14 tactfulness16 tactfulnesses18 untactfulness18 untactfulnesses20
Find what other words can be done using letters: "untactfully"
https://scrabble-word.com/finder/untactfully
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