disc plough vs disc plow

disc plough and disc plow both are nouns.

Word	Noun	Adjective	Verb	Adverb
disc plough	Yes	No	No	No
disc plow	Yes	No	No	No

As nouns, disc plough and disc plow are synonyms defined as:

disc plough and disc plow: a plow that consists of a gang of concave steel cutting disks, used for work in hard dry soils.

disc plough (noun)	disc plow (noun)
a plow that consists of a gang of concave steel cutting disks, used for work in hard dry soils.	a plow that consists of a gang of concave steel cutting disks, used for work in hard dry soils.