Founding Father vs solon

Founding Father and solon both are nouns.

Word	Noun	Adjective	Verb	Adverb
Founding Father	Yes	No	No	No
solon	Yes	No	No	No

As nouns, solon is a hypernym of Founding Father; that is, solon is a word with a broader meaning than Founding Father:

Founding Father: a member of the Constitutional Convention that drafted the United States Constitution in 1787
solon: a person who is a respected leader in national or international affairs

Other hypernyms of Founding Father include national leader.

Founding Father (noun)	solon (noun)
a member of the Constitutional Convention that drafted the United States Constitution in 1787	a person who is a respected leader in national or international affairs