rottenness vs rot

rottenness and rot both are nouns.

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

As nouns, rot is a hypernym of rottenness; that is, rot is a word with a broader meaning than rottenness:

Other hypernyms of rottenness include putrefaction.

rottenness (noun)	rot (noun)
the quality of rotting and becoming putrid	unacceptable behavior (especially ludicrously false statements)
in a state of progressive putrefaction	(biology) the process of decay caused by bacterial or fungal action
	a state of decay usually accompanied by an offensive odor

rottenness (verb)	rot (verb)
	become physically weaker
	break down