sexual activity vs furrow

sexual activity and furrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
sexual activity	Yes	No	No	No
furrow	Yes	No	Yes	No

sexual activity (noun)	furrow (noun)
activities associated with sexual intercourse	a long shallow trench in the ground (especially one made by a plow)
	a slight depression or fold in the smoothness of a surface

sexual activity (verb)	furrow (verb)
	hollow out in the form of a furrow or groove
	make wrinkled or creased
	cut a furrow into a columns