rust vs crumble

crumble vs rust

rust is a noun but crumble is not a noun.

rust is an adjective but crumble is not an adjective.

rust and crumble both are verbs.

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

As verbs, crumble is a hypernym of rust; that is, crumble is a word with a broader meaning than rust:

rust: become destroyed by water, air, or a corrosive such as an acid
crumble: fall into decay or ruin

Other hypernyms of rust include decay, dilapidate.

rust (noun)	crumble (noun)
A strong reddish brown color.
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)	crumble (adjective)
of the brown color of rust

rust (verb)	crumble (verb)
become destroyed by water, air, or a corrosive such as an acid	break or fall apart into fragments
cause to deteriorate due to the action of water, air, or an acid	fall into decay or ruin
become coated with oxide	fall apart

Difference between rust and crumble

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