Untasteful is valid Scrabble Word

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

Definitions for UNTASTEFUL in dictionary:

Similar words containing TASTE without suffix ful and without prefix un

taste5 tasted7 taster6 tastes6 retaste7 tasters7 cytaster13 distaste9 pretaste10 retasted9 retastes8 tasteful11 tastevin11 untasted9 cytasters14 distasted11 distastes10 foretaste12 poetaster11 pretasted12 pretastes11 tasteable11 tasteless9 tastevins12 teataster9 aftertaste13 foretasted14 foretastes13 poetasters12 poetastery15 tastefully16 tastemaker16 teatasters10 aftertastes14 distasteful15 tastelessly14 tastemakers17 cheesetaster17 poetasteries14 poetastering15 tastefulness15 cheesetasters18 distastefully20 poetasterings16 tastelessness13 tastefulnesses17 distastefulness19 tastelessnesses15 distastefulnesses21
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