bun divider vs bun rounder

bun divider and bun rounder both are nouns.

Word	Noun	Adjective	Verb	Adverb
bun divider	Yes	No	No	No
bun rounder	Yes	No	No	No

As nouns, bun divider and bun rounder are synonyms defined as:

bun divider and bun rounder: a machine that cuts raw dough into small portions and rolls each to obtain balls of the same weight and shape.

bun divider (noun)	bun rounder (noun)
a machine that cuts raw dough into small portions and rolls each to obtain balls of the same weight and shape.	a machine that cuts raw dough into small portions and rolls each to obtain balls of the same weight and shape.