spectrographic analysis vs spectrum analysis

spectrographic analysis and spectrum analysis both are nouns.

Word	Noun	Adjective	Verb	Adverb
spectrographic analysis	Yes	No	No	No
spectrum analysis	Yes	No	No	No

As nouns, spectrographic analysis and spectrum analysis are synonyms defined as:

spectrographic analysis and spectrum analysis: the use of spectroscopes to analyze spectra

Other synonyms of spectrographic analysis include spectrometry, spectroscopic analysis, spectroscopy.

spectrographic analysis (noun)	spectrum analysis (noun)
the use of spectroscopes to analyze spectra	the use of spectroscopes to analyze spectra