scatology vs chemical analysis

scatology and chemical analysis both are nouns.

Word	Noun	Adjective	Verb	Adverb
scatology	Yes	No	No	No
chemical analysis	Yes	No	No	No

As nouns, chemical analysis is a hypernym of scatology; that is, chemical analysis is a word with a broader meaning than scatology:

scatology: (medicine) the chemical analysis of excrement (for medical diagnosis or for paleontological purposes)
chemical analysis: the act of decomposing a substance into its constituent elements

Other hypernyms of scatology include qualitative analysis.

scatology (noun)	chemical analysis (noun)
(medicine) the chemical analysis of excrement (for medical diagnosis or for paleontological purposes)	the act of decomposing a substance into its constituent elements
a preoccupation with obscenity (especially that dealing with excrement or excretory functions)