venter vs underbody

venter and underbody both are nouns.

Word	Noun	Adjective	Verb	Adverb
venter	Yes	No	No	No
underbody	Yes	No	No	No

As nouns, underbody is a hyponym of venter; that is, underbody is a word with a more specific, narrower meaning than venter:

venter: the region of the body of a vertebrate between the thorax and the pelvis
underbody: the soft belly or underside of an animal's body

Other hyponyms of venter include underbelly.

venter (noun)	underbody (noun)
the region of the body of a vertebrate between the thorax and the pelvis	the soft belly or underside of an animal's body
a bulging body part (as the belly of a muscle)
the womb
a speaker who expresses or gives vent to a personal opinion or grievance