harrow vs plough

harrow and plough both are nouns.

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

As verbs, plough is a hypernym of harrow; that is, plough is a word with a broader meaning than harrow:

Other hypernyms of harrow include plow, turn.

harrow (noun)	plough (noun)
a cultivator that pulverizes or smooths the soil	a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing

harrow (verb)	plough (verb)
draw a harrow over (land)	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