Federal Democratic Republic of Ethiopia vs Abyssinia

Federal Democratic Republic of Ethiopia and Abyssinia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Federal Democratic Republic of Ethiopia	Yes	No	No	No
Abyssinia	Yes	No	No	No

As nouns, Federal Democratic Republic of Ethiopia and Abyssinia are synonyms defined as:

Federal Democratic Republic of Ethiopia and Abyssinia: Ethiopia is a republic in northeastern Africa on the Red Sea; formerly called Abyssinia

Other synonyms of Federal Democratic Republic of Ethiopia include Ethiopia, Yaltopya.

Federal Democratic Republic of Ethiopia (noun)	Abyssinia (noun)
Ethiopia is a republic in northeastern Africa on the Red Sea; formerly called Abyssinia	Ethiopia is a republic in northeastern Africa on the Red Sea; formerly called Abyssinia