Unsoftening is valid Scrabble Word

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

11 letters word
15 points in Scrabble
20 points in WWF

Definitions for UNSOFTENING in dictionary:

ADJECTIVE:

not softening

How to use UNSOFTENING in a sentence

His name, infamous now, would have an additional horror, and ever be remembered by posterity in unspeakable loathing, in unsoftening wrath.

Similar words containing SOFTEN without suffix ing and without prefix un

soften9 softens10 resoften11 softened12 softener11 resoftens12 softeners12 softening13 resoftened14 softenings14 unsoftened14 resoftening15

Find what other words can be done using letters: "unsoftening"
https://scrabble-word.com/finder/unsoftening

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