rot vs drivel

rot and drivel both are nouns.

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

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

Other hypernyms of rot include garbage.

rot (noun)	drivel (noun)
unacceptable behavior (especially ludicrously false statements)	saliva spilling from the mouth
(biology) the process of decay caused by bacterial or fungal action	a worthless message
a state of decay usually accompanied by an offensive odor

rot (verb)	drivel (verb)
become physically weaker	let saliva drivel from the mouth
break down