ideogram vs ideograph

ideogram and ideograph both are nouns.

Word	Noun	Adjective	Verb	Adverb
ideogram	Yes	No	No	No
ideograph	Yes	No	No	No

As nouns, ideogram and ideograph are synonyms defined as:

ideogram and ideograph: a graphic character that indicates the meaning of a thing without indicating the sounds used to say it

ideogram (noun)	ideograph (noun)
a graphic character that indicates the meaning of a thing without indicating the sounds used to say it	a graphic character that indicates the meaning of a thing without indicating the sounds used to say it