italic vs font

italic and font both are nouns.

Word	Noun	Adjective	Verb	Adverb
italic	Yes	Yes	No	No
font	Yes	No	No	No

As nouns, font is a hypernym of italic; that is, font is a word with a broader meaning than italic:

Other hypernyms of italic include case, face, fount, typeface.

italic (noun)	font (noun)
a typeface with letters slanting upward to the right	bowl for baptismal water
a style of handwriting with the letters slanting to the right	a specific size and style of type within a type family

italic (adjective)	font (adjective)
characterized by slanting characters