spectrograph vs photo

spectrograph and photo both are nouns.

Word	Noun	Adjective	Verb	Adverb
spectrograph	Yes	No	No	No
photo	Yes	No	No	No

As nouns, photo is a hypernym of spectrograph; that is, photo is a word with a broader meaning than spectrograph:

spectrograph: a photographic record of a spectrum
photo: a representation of a person or scene in the form of a print or transparent slide or in digital format

Other hypernyms of spectrograph include exposure, photograph, pic, picture.

spectrograph (noun)	photo (noun)
a spectroscope by which spectra can be photographed	a representation of a person or scene in the form of a print or transparent slide or in digital format
a photographic record of a spectrum