harrow vs disk harrow

harrow and disk harrow both are nouns.

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

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

Other hyponyms of harrow include disc harrow, tine harrow, rotary harrow.

harrow (noun)	disk harrow (noun)
a cultivator that pulverizes or smooths the soil	a harrow with a series of disks set on edge at an angle

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