Synonyms for rust

noun

• the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
• any of various fungi causing rust disease in plants
• a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi
• a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture

adjective

• of the brown color of rust

verb

• become destroyed by water, air, or a corrosive such as an acid
• cause to deteriorate due to the action of water, air, or an acid
• become coated with oxide