water ox vs water buffalo

water ox and water buffalo both are nouns.

Word	Noun	Adjective	Verb	Adverb
water ox	Yes	No	No	No
water buffalo	Yes	No	No	No

As nouns, water ox and water buffalo are synonyms defined as:

water ox and water buffalo: an Asian buffalo that is often domesticated for use as a draft animal

Other synonyms of water ox include Asiatic buffalo, Bubalus bubalis.

water ox (noun)	water buffalo (noun)
an Asian buffalo that is often domesticated for use as a draft animal	an Asian buffalo that is often domesticated for use as a draft animal