Tel Aviv vs Tel Aviv-Yafo

Tel Aviv and Tel Aviv-Yafo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tel Aviv	Yes	No	No	No
Tel Aviv-Yafo	Yes	No	No	No

As nouns, Tel Aviv and Tel Aviv-Yafo are synonyms defined as:

Tel Aviv and Tel Aviv-Yafo: the largest city and financial center of Israel; located in western Israel on the Mediterranean

Other synonyms of Tel Aviv include Tel Aviv-Jaffa.

Tel Aviv (noun)	Tel Aviv-Yafo (noun)
the largest city and financial center of Israel; located in western Israel on the Mediterranean	the largest city and financial center of Israel; located in western Israel on the Mediterranean