Establishable is valid Scrabble Word

Is establishable a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is establishable valid Words with Friends?
Words with Friends YES

13 letters word
20 points in Scrabble
23 points in WWF

Definitions for ESTABLISHABLE in dictionary:

VERB (USED WITH OBJECT):

to found, institute, build, or bring into being on a firm or stable basis: to establish a university; to establish a medical practice.
to show to be valid or true; prove: to establish the facts of the matter.
to cause to be accepted or recognized: to establish a custom; She established herself as a leading surgeon.
to bring about permanently: to establish order.
to enact, appoint, or ordain for permanence, as a law; fix unalterably.
to make (a church) a national or state institution.
to obtain control of (a suit) so that one can win all the subsequent tricks in it.
to install or settle in a position, place, business, etc.: to establish one's child in business.

ADJECTIVE:

capable of being established

OTHER DEFINITIONS:

to institute (as a law) permanently by enactment or agreement

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