dirty word vs excretion

dirty word and excretion both are nouns.

Word	Noun	Adjective	Verb	Adverb
dirty word	Yes	No	No	No
excretion	Yes	No	No	No

dirty word (noun)	excretion (noun)
an offensive or indecent word or phrase	the bodily process of discharging waste matter
a word that is considered to be unmentionable	waste matter (as urine or sweat but especially feces) discharged from the body