Monostomous is valid Scrabble Word

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

11 letters word
15 points in Scrabble
19 points in WWF

Definitions for MONOSTOMOUS in dictionary:

ADJECTIVE:

having only one mouth, pore or similar opening, also MONOSTOME
having only one mouth, pore or similar opening

Similar words containing STOMOU without suffix s and without prefix mono

astomous10 amphistomous21 angiostomous15 cyclostomous21 microstomous18 physostomous22 teleostomous14 plagiostomous18

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