phonogram vs printed symbol

phonogram and printed symbol both are nouns.

Word	Noun	Adjective	Verb	Adverb
phonogram	Yes	No	No	No
printed symbol	Yes	No	No	No

As nouns, printed symbol is a hypernym of phonogram; that is, printed symbol is a word with a broader meaning than phonogram:

phonogram: any written symbol standing for a sound or syllable or morpheme or word
printed symbol: a written or printed symbol

Other hypernyms of phonogram include written symbol.

phonogram (noun)	printed symbol (noun)
any written symbol standing for a sound or syllable or morpheme or word	a written or printed symbol