magnetism vs geophysics

magnetism and geophysics both are nouns.

Word	Noun	Adjective	Verb	Adverb
magnetism	Yes	No	No	No
geophysics	Yes	No	No	No

As nouns, geophysics is a hypernym of magnetism; that is, geophysics is a word with a broader meaning than magnetism:

magnetism: the branch of science that studies magnetism
geophysics: geology that uses physical principles to study properties of the earth

Other hypernyms of magnetism include geophysical science.

magnetism (noun)	geophysics (noun)
the branch of science that studies magnetism	geology that uses physical principles to study properties of the earth
attraction for iron; associated with electric currents as well as magnets; characterized by fields of force