Is “Commensalism” a Scrabble word?
Yes
COMMENSALISM
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Commensalism
/kəˈmɛnsəˌlɪzm̩/
noun
1.A sharing of the same environment by two organisms where one species benefits and the other is unaffected. An example is barnacles on whales.
2.The act of eating together; table fellowship.