bay window vs tummy

bay window and tummy both are nouns.

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

As nouns, bay window and tummy are synonyms defined as:

Other synonyms of bay window include corporation, pot, potbelly.

bay window (noun)	tummy (noun)
a window that sticks out from the outside wall of a house	an enlarged and muscular saclike organ of the alimentary canal; the principal organ of digestion
slang for a paunch	slang for a paunch