Is “Commonwealth” a Scrabble word?
Yes
COMMONWEALTH
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 Commonwealth
/ˈkɔmənˌwɛlθ/
noun
1.The well-being of a community.
2.The entirety of a (secular) society, a polity, a state.
3.Republic. Often capitalized, as Commonwealth.