buffalo chip vs cow chip

buffalo chip and cow chip both are nouns.

Word	Noun	Adjective	Verb	Adverb
buffalo chip	Yes	No	No	No
cow chip	Yes	No	No	No

As nouns, buffalo chip and cow chip are synonyms defined as:

Other synonyms of buffalo chip include chip, cow dung.

buffalo chip (noun)	cow chip (noun)
a piece of dried bovine dung	a piece of dried bovine dung