Interpenetrations is valid word

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

17 letters word
19 points in Scrabble
23 points in WWF

Definitions for INTERPENETRATIONS in dictionary:

VERB (USED WITHOUT OBJECT) [INÂ·TERÂ·PENÂ·EÂ·TRATÂ·ED, INÂ·TERÂ·PENÂ·EÂ·TRATÂ·ING.]:

to penetrate between things or parts.
to penetrate each other.

VERB (USED WITH OBJECT) [INÂ·TERÂ·PENÂ·EÂ·TRATÂ·ED, INÂ·TERÂ·PENÂ·EÂ·TRATÂ·ING.]:

to penetrate thoroughly; permeate.
to penetrate with (something else) mutually or reciprocally.

Similar words containing TERPENETRATION without suffix s and without prefix in

interpenetration18

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