Is “Overconfident” a Scrabble word?
Yes
OVERCONFIDENT
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 Overconfident
/ˌəʊvə(ɹ)ˈkɒnfɪdənt/
adjective
1.Too confident.
2.Presumptuous, cocksure, rude and disrespectful.