Is “Shamus” a Scrabble word?
Yes
SHAMUS
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 Shamus
/ˈʃeɪməs/
noun
1.A private detective; originally, a policeman or police detective.