sans serif vs fount

sans serif and fount both are nouns.

Word	Noun	Adjective	Verb	Adverb
sans serif	Yes	No	No	No
fount	Yes	No	No	No

As nouns, fount is a hypernym of sans serif; that is, fount is a word with a broader meaning than sans serif:

Other hypernyms of sans serif include case, face, font, typeface.

sans serif (noun)	fount (noun)
a typeface in which characters have no serifs	a plumbing fixture that provides a flow of water
	a specific size and style of type within a type family