logogram vs logograph

logogram and logograph both are nouns.

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

As nouns, logogram and logograph are synonyms defined as:

logogram and logograph: a single written symbol that represents an entire word or phrase without indicating its pronunciation

logogram (noun)	logograph (noun)
a single written symbol that represents an entire word or phrase without indicating its pronunciation	a single written symbol that represents an entire word or phrase without indicating its pronunciation