Unfavourite is valid Scrabble Word

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

Definitions for UNFAVOURITE in dictionary:

Similar words containing FAVOUR without suffix ite and without prefix un

favour12 favours13 favoured15 favourer14 disfavour16 favourers15 favouring16 favourite15 disfavours17 favourable18 favourably21 favourites16 favourless16 overfavour19 unfavoured17 disfavoured19 disfavourer18 favouringly21 favouritism19 overfavours20 disfavourers19 disfavouring20 favouredness19 favouritisms20 overfavoured22 unfavourable20 unfavourably23 overfavouring23 favourableness22 favourednesses21
Find what other words can be done using letters: "unfavourite"
https://scrabble-word.com/finder/unfavourite
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