Spanish-American War vs Manila Bay

Spanish-American War and Manila Bay both are nouns.

Word	Noun	Adjective	Verb	Adverb
Spanish-American War	Yes	No	No	No
Manila Bay	Yes	No	No	No

Spanish-American War (noun)	Manila Bay (noun)
a war between the United States and Spain in 1898	a naval battle in the Spanish-American War (1898); the American fleet under Admiral Dewey defeated the Spanish fleet