middle buster vs middlebreaker

middle buster and middlebreaker both are nouns.

Word	Noun	Adjective	Verb	Adverb
middle buster	Yes	No	No	No
middlebreaker	Yes	No	No	No

As nouns, middle buster and middlebreaker are synonyms defined as:

middle buster and middlebreaker: moldboard plow with a double moldboard designed to move dirt to either side of a central furrow

Other synonyms of middle buster include lister, lister plough, lister plow.

middle buster (noun)	middlebreaker (noun)
moldboard plow with a double moldboard designed to move dirt to either side of a central furrow	moldboard plow with a double moldboard designed to move dirt to either side of a central furrow