rust vs apple rust

apple rust vs rust

rust and apple rust both are nouns.

rust is an adjective but apple rust is not an adjective.

rust is a verb but apple rust is not a verb.

Word	Noun	Adjective	Verb	Adverb
rust	Yes	Yes	Yes	No
apple rust	Yes	No	No	No

As nouns, apple rust is a hyponym of rust; that is, apple rust is a word with a more specific, narrower meaning than rust:

rust: any of various fungi causing rust disease in plants
apple rust: rust fungus causing rust spots on apples and pears etc

Other hyponyms of rust include flax rust, flax rust fungus, Melampsora lini, blister rust, Cronartium ribicola, Puccinia graminis, wheat rust, cedar-apple rust, Gymnosporangium juniperi-virginianae.

rust (noun)	apple rust (noun)
A strong reddish brown color.	rust fungus causing rust spots on apples and pears etc
any of various fungi causing rust disease in plants
the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
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

rust (adjective)	apple rust (adjective)
of the brown color of rust

rust (verb)	apple 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

Difference between rust and apple rust

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