moldboard plow vs plow

moldboard plow and plow both are nouns.

Word	Noun	Adjective	Verb	Adverb
moldboard plow	Yes	No	No	No
plow	Yes	No	Yes	No

As nouns, plow is a hypernym of moldboard plow; that is, plow is a word with a broader meaning than moldboard plow:

moldboard plow: plow that has a moldboard
plow: a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing

Other hypernyms of moldboard plow include plough.

moldboard plow (noun)	plow (noun)
plow that has a moldboard	a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing

moldboard plow (verb)	plow (verb)
	act on verbally or in some form of artistic expression
	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