spectrum analysis vs spectrographic analysis

spectrum analysis and spectrographic analysis both are nouns.

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

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

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

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

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