ard plough vs scratch plough

ard plough and scratch plough both are nouns.

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

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

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

Other synonyms of ard plough include ard.

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