Tarpaulin
Part of speech: noun
Definition: A heavy, waterproof sheet of material, often cloth, used as a cover. A sailor. Often abbreviated to just tar. Any heavy, waterproof material used as a cover. Canvas waterproofed with tar, used as a cover.
Tarp
Part of speech: noun
Definition: Short form of tarpaulin.
Part of speech: verb
Definition: To cover something with a tarpaulin.