Superhardening is valid Scrabble Word

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

14 letters word
21 points in Scrabble
25 points in WWF

Definitions for SUPERHARDENING in dictionary:

VERB (USED WITH OBJECT) [MILITARY.]:

harden.

VERB:

SUPERHARDEN, to harden to extremes

Words related to SUPERHARDENING

superharden17

Similar words containing HARDEN without suffix ing and without prefix super

harden10 hardens11 hardened13 hardener12 reharden12 hardeners13 hardening14 preharden15 rehardens13 hardenings15 prehardens16 rehardened15 unhardened15 hardenable16 prehardened18 rehardening16 superharden17 prehardening19 superhardens18 superhardened20

Find what other words can be done using letters: "superhardening"
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