Abyssinia vs Ethiopia

Abyssinia and Ethiopia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Abyssinia	Yes	No	No	No
Ethiopia	Yes	No	No	No

As nouns, Abyssinia and Ethiopia are synonyms defined as:

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

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

Abyssinia (noun)	Ethiopia (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