seismology vs geophysics

seismology and geophysics both are nouns.

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

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

seismology: the branch of geology that studies earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies
geophysics: geology that uses physical principles to study properties of the earth

Other hypernyms of seismology include geophysical science.

seismology (noun)	geophysics (noun)
the branch of geology that studies earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies	geology that uses physical principles to study properties of the earth