wellspring vs rootage

wellspring and rootage both are nouns.

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

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

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

wellspring (noun)	rootage (noun)
an abundant source	the place where something begins, where it springs into being
the source of water for a well	a developed system of roots
	fixedness by or as if by roots