holograph vs hologram

holograph and hologram both are nouns.

Word	Noun	Adjective	Verb	Adverb
holograph	Yes	No	No	No
hologram	Yes	No	No	No

As nouns, holograph and hologram are synonyms defined as:

holograph and hologram: the intermediate photograph (or photographic record) that contains information for reproducing a three-dimensional image by holography

holograph (noun)	hologram (noun)
the intermediate photograph (or photographic record) that contains information for reproducing a three-dimensional image by holography	the intermediate photograph (or photographic record) that contains information for reproducing a three-dimensional image by holography
handwritten book or document