logograph vs logogram

logograph and logogram both are nouns.

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

As nouns, logograph and logogram are synonyms defined as:

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

logograph (noun)	logogram (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