Transgressional is valid Scrabble Word

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

Definitions for TRANSGRESSIONAL in dictionary:

Similar words containing GRESSION without suffix al and without prefix trans

egression10 aggression12 degression12 digression12 egressions11 ingression11 regression11 aggressions13 degressions13 digressions13 ingressions12 progression14 regressions12 digressional14 progressions15 congressional16 digressionary18 introgression14 nonaggression15 progressional16 retrogression14 transgression14 antiaggression16 introgressions15 nonaggressions16 progressionary20 progressionism19 progressionist17 retrogressions15 transgressions15 congressionally21 progressionally21 progressionisms20 progressionists18 retrogressional16 microaggression21 counteraggression21 counteraggressions22
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