rot vs necrose

rot is a noun but necrose is not a noun.

Word	Noun	Adjective	Verb	Adverb
rot	Yes	No	Yes	No
necrose	No	No	Yes	No

As verbs, necrose is a hyponym of rot; that is, necrose is a word with a more specific, narrower meaning than rot:

Other hyponyms of rot include gangrene, mortify, sphacelate.

rot (noun)	necrose (noun)
unacceptable behavior (especially ludicrously false statements)
(biology) the process of decay caused by bacterial or fungal action
a state of decay usually accompanied by an offensive odor

rot (verb)	necrose (verb)
become physically weaker	undergo necrosis
break down