Is “Tinhorn” a Scrabble word?
Yes
TINHORN
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 Tinhorn
noun
1.A contemptible or pretentious person, especially one who gambles for low stakes.
adjective
1.Cheap, inferior; pretentious.