fountainhead vs wellspring

fountainhead and wellspring both are nouns.

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

As nouns, fountainhead and wellspring are synonyms defined as:

Other synonyms of fountainhead include well.

fountainhead (noun)	wellspring (noun)
an abundant source	an abundant source
the source of water from which a stream arises	the source of water for a well