country of origin vs fatherland

country of origin and fatherland both are nouns.

Word	Noun	Adjective	Verb	Adverb
country of origin	Yes	No	No	No
fatherland	Yes	No	No	No

As nouns, country of origin and fatherland are synonyms defined as:

Other synonyms of country of origin include homeland, mother country, motherland, native land.

country of origin (noun)	fatherland (noun)
the country where you were born	the country where you were born