birthplace vs rootage

birthplace and rootage both are nouns.

Word	Noun	Adjective	Verb	Adverb
birthplace	Yes	No	No	No
rootage	Yes	No	No	No

As nouns, rootage is a hypernym of birthplace; that is, rootage is a word with a broader meaning than birthplace:

birthplace: where something originated or was nurtured in its early existence
rootage: the place where something begins, where it springs into being

Other hypernyms of birthplace include beginning, origin, root, source.

birthplace (noun)	rootage (noun)
the place where someone was born	the place where something begins, where it springs into being
where something originated or was nurtured in its early existence	a developed system of roots
	fixedness by or as if by roots