Is “Handbook” a Scrabble word?
Yes
HANDBOOK
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 Handbook
noun
1.A topically organized book of reference on a certain field of knowledge, regardless of size.
2.A place where illicit bets can be placed.