Is “Rainiest” a Scrabble word?
Yes
RAINIEST
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 Rainiest
adjective
1.Pouring with rain; wet; showery
“Due to the rainy weather, we decided not to play in the park.”