founding vs beginning

founding and beginning both are nouns.

Word	Noun	Adjective	Verb	Adverb
founding	Yes	No	No	No
beginning	Yes	Yes	No	No

As nouns, beginning is a hypernym of founding; that is, beginning is a word with a broader meaning than founding:

founding: the act of starting something for the first time; introducing something new
beginning: the act of starting something

Other hypernyms of founding include commencement, start.

founding (noun)	beginning (noun)
the act of starting something for the first time; introducing something new	the act of starting something
	the first part or section of something
	the event consisting of the start of something
	the place where something begins, where it springs into being
	the time at which something is supposed to begin

founding (adjective)	beginning (adjective)
	serving to begin