oceanography vs earth science

oceanography and earth science both are nouns.

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

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

oceanography: the branch of science dealing with physical and biological aspects of the oceans
earth science: any of the sciences that deal with the earth or its parts

oceanography (noun)	earth science (noun)
the branch of science dealing with physical and biological aspects of the oceans	any of the sciences that deal with the earth or its parts