"rusts" in the noun sense

1. rust

a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture

2. rust

a plant disease that produces a reddish-brown discoloration of leaves and stems caused by various rust fungi

3. rust, rusting

the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water

4. rust, rust fungus

any of various fungi causing rust disease in plants

"rusts" in the verb sense

1. corrode, rust

become destroyed by water, air, or a corrosive such as an acid

"The metal corroded"

"The pipes rusted"

2. corrode, eat, rust

cause to deteriorate due to the action of water, air, or an acid

"The acid corroded the metal"

"The steady dripping of water rusted the metal stopper in the sink"

3. rust

become coated with oxide

Source: WordNet® (An amazing lexical database of English)

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