Is “Subbranch” a Scrabble word?
Yes
SUBBRANCH
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 Subbranch
noun
1.A branch that is itself an offshoot of a branch of something.
2.Part of a branch.