heart failure vs coronary failure

heart failure and coronary failure both are nouns.

Word	Noun	Adjective	Verb	Adverb
heart failure	Yes	No	No	No
coronary failure	Yes	No	No	No

As nouns, heart failure and coronary failure are synonyms defined as:

heart failure and coronary failure: inability of the heart to pump enough blood to sustain normal bodily functions

heart failure (noun)	coronary failure (noun)
inability of the heart to pump enough blood to sustain normal bodily functions	inability of the heart to pump enough blood to sustain normal bodily functions