logogram vs ideograph

logogram and ideograph both are nouns.

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

As nouns, ideograph is a hypernym of logogram; that is, ideograph is a word with a broader meaning than logogram:

logogram: a single written symbol that represents an entire word or phrase without indicating its pronunciation
ideograph: a graphic character that indicates the meaning of a thing without indicating the sounds used to say it

Other hypernyms of logogram include ideogram.

logogram (noun)	ideograph (noun)
a single written symbol that represents an entire word or phrase without indicating its pronunciation	a graphic character that indicates the meaning of a thing without indicating the sounds used to say it