rot vs Irish bull

rot and Irish bull both are nouns.

Word	Noun	Adjective	Verb	Adverb
rot	Yes	No	Yes	No
Irish bull	Yes	No	No	No

As nouns, Irish bull is a hyponym of rot; that is, Irish bull is a word with a more specific, narrower meaning than rot:

Other hyponyms of rot include bull, bullshit, crap, dogshit, horseshit, shit.

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

rot (verb)	Irish bull (verb)
become physically weaker
break down