Implacableness is valid Scrabble Word

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

14 letters word
22 points in Scrabble
29 points in WWF

Definitions for IMPLACABLENESS in dictionary:

NOUN:

the state of being implacable
The quality of being implacable; implacability.

How to use IMPLACABLENESS in a sentence

He earned his fame by the energy and implacableness of his hate.
The implacableness of her stupid uncles is all mine.

Similar words containing PLACABLENES without suffix s and without prefix im

placableness18 placablenesses20

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