Is “Rust” a Scrabble word?
Yes
RUST
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 Rust
/ɹʌst/
noun
1.The deteriorated state of iron or steel as a result of moisture and oxidation.
“The rust on my bicycle chain made cycling to work very dangerous.”
2.A similar substance based on another metal (usually with qualification, such as "copper rust").
“aerugo. Green or blue-green copper rust; verdigris. (American Heritage Dictionary, 1973)”
3.A reddish-brown color.