sexual practice vs tail end

sexual practice and tail end both are nouns.

Word	Noun	Adjective	Verb	Adverb
sexual practice	Yes	No	No	No
tail end	Yes	No	No	No

sexual practice (noun)	tail end (noun)
activities associated with sexual intercourse	the fleshy part of the human body that you sit on
	any projection that resembles the tail of an animal
	the time of the last part of something