scratch plough vs plough

scratch plough and plough both are nouns.

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

As nouns, plough is a hypernym of scratch plough; that is, plough is a word with a broader meaning than scratch plough:

scratch plough: a simple light plough without a mouldboard.
plough: a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing

Other hypernyms of scratch plough include plow.

scratch plough (noun)	plough (noun)
a simple light plough without a mouldboard.	a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing

scratch plough (verb)	plough (verb)
	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