belly vs bay window

belly and bay window both are nouns.

Word	Noun	Adjective	Verb	Adverb
belly	Yes	No	Yes	No
bay window	Yes	No	No	No

As nouns, bay window is a hyponym of belly; that is, bay window is a word with a more specific, narrower meaning than belly:

Other hyponyms of belly include corporation, pot, potbelly, tummy.

belly (noun)	bay window (noun)
the underpart of the body of certain vertebrates such as snakes or fish	a window that sticks out from the outside wall of a house
the region of the body of a vertebrate between the thorax and the pelvis	slang for a paunch
a protruding abdomen
the hollow inside of something
a part that bulges deeply

belly (verb)	bay window (verb)
swell out or bulge out