Lebanon vs Lebanese Republic

Lebanon and Lebanese Republic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lebanon	Yes	No	No	No
Lebanese Republic	Yes	No	No	No

As nouns, Lebanon and Lebanese Republic are synonyms defined as:

Lebanon and Lebanese Republic: an Asian republic at east end of Mediterranean

Lebanon (noun)	Lebanese Republic (noun)
an Asian republic at east end of Mediterranean	an Asian republic at east end of Mediterranean