delve vs plough

delve is not a noun while plough is a noun.

Word	Noun	Adjective	Verb	Adverb
delve	No	No	Yes	No
plough	Yes	No	Yes	No

delve (noun)	plough (noun)
	a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing

delve (verb)	plough (verb)
turn up, loosen, or remove earth	to break and turn over earth especially with a plow
	move in a way resembling that of a plow cutting into or going through the soil