scratch plough vs ard plough

scratch plough and ard plough both are nouns.

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

As nouns, scratch plough and ard plough are synonyms defined as:

scratch plough and ard plough: a simple light plough without a mouldboard.

Other synonyms of scratch plough include ard.

scratch plough (noun)	ard plough (noun)
a simple light plough without a mouldboard.	a simple light plough without a mouldboard.