State of Eritrea vs Eritrea

State of Eritrea and Eritrea both are nouns.

Word	Noun	Adjective	Verb	Adverb
State of Eritrea	Yes	No	No	No
Eritrea	Yes	No	No	No

As nouns, State of Eritrea and Eritrea are synonyms defined as:

State of Eritrea and Eritrea: an African country to the north of Ethiopia on the Red Sea; achieved independence from Ethiopia in 1993

State of Eritrea (noun)	Eritrea (noun)
an African country to the north of Ethiopia on the Red Sea; achieved independence from Ethiopia in 1993	an African country to the north of Ethiopia on the Red Sea; achieved independence from Ethiopia in 1993