Halicarnassus vs city

Halicarnassus and city both are nouns.

Word	Noun	Adjective	Verb	Adverb
Halicarnassus	Yes	No	No	No
city	Yes	No	No	No

Halicarnassus (noun)	city (noun)
an ancient Greek city on the southwestern coast of Asia Minor in what is now Turkey; site of the mausoleum at Halicarnassus	people living in a large densely populated municipality
	a large and densely populated urban area; may include several independent administrative districts
	an incorporated administrative district established by state charter