fossilology vs earth science

fossilology and earth science both are nouns.

Word	Noun	Adjective	Verb	Adverb
fossilology	Yes	No	No	No
earth science	Yes	No	No	No

As nouns, earth science is a hypernym of fossilology; that is, earth science is a word with a broader meaning than fossilology:

fossilology: the earth science that studies fossil organisms and related remains
earth science: any of the sciences that deal with the earth or its parts

fossilology (noun)	earth science (noun)
the earth science that studies fossil organisms and related remains	any of the sciences that deal with the earth or its parts