plough vs harrow

plough and harrow both are nouns.

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

As verbs, harrow is a hyponym of plough; that is, harrow is a word with a more specific, narrower meaning than plough:

Other hyponyms of plough include ridge, disk.

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

plough (verb)	harrow (verb)
to break and turn over earth especially with a plow	draw a harrow over (land)
move in a way resembling that of a plow cutting into or going through the soil