dirty word vs tail end

dirty word and tail end both are nouns.

Word	Noun	Adjective	Verb	Adverb
dirty word	Yes	No	No	No
tail end	Yes	No	No	No

dirty word (noun)	tail end (noun)
an offensive or indecent word or phrase	the fleshy part of the human body that you sit on
a word that is considered to be unmentionable	any projection that resembles the tail of an animal
	the time of the last part of something