Nouns

(n)abdomen, venter, stomach, bellythe region of the body of a vertebrate between the thorax and the pelvis
(n)belly, pauncha protruding abdomen
(n)bellya part that bulges deeply“the belly of a sail”
(n)bellythe hollow inside of something“in the belly of the ship”
(n)bellythe underpart of the body of certain vertebrates such as snakes or fish

Verbs

(v)belly, belly outswell out or bulge out