Is “Rainproof” a Scrabble word?
Yes
RAINPROOF
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 Rainproof
verb
1.To make rainproof.
adjective
1.(of external clothing) waterproof