rust vs blister rust

rust and blister rust both are nouns.

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

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

rust: any of various fungi causing rust disease in plants
blister rust: fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host

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

rust: a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi
blister rust: any of several diseases of pines caused by rust fungi of the genus Cronartium and marked by destructive invasion of bark and sapwood and producing blisters externally

Other hyponyms of rust include white-pine rust, white pine blister rust.

rust (noun)	blister rust (noun)
A strong reddish brown color.	fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host
any of various fungi causing rust disease in plants	any of several diseases of pines caused by rust fungi of the genus Cronartium and marked by destructive invasion of bark and sapwood and producing blisters externally
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)	blister rust (adjective)
of the brown color of rust

rust (verb)	blister 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