sphacelate vs gangrene

sphacelate is not a noun while gangrene is a noun.

Word	Noun	Adjective	Verb	Adverb
sphacelate	No	No	Yes	No
gangrene	Yes	No	Yes	No

As verbs, sphacelate and gangrene are synonyms defined as:

Other synonyms of sphacelate include mortify, necrose.

sphacelate (noun)	gangrene (noun)
	the localized death of living cells (as from infection or the interruption of blood supply)
	necrotic tissue; a mortified or gangrenous part or mass

sphacelate (verb)	gangrene (verb)
undergo necrosis	undergo necrosis