seism vs geological phenomenon

seism and geological phenomenon both are nouns.

Word	Noun	Adjective	Verb	Adverb
seism	Yes	No	No	No
geological phenomenon	Yes	No	No	No

As nouns, geological phenomenon is a hypernym of seism; that is, geological phenomenon is a word with a broader meaning than seism:

seism: shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity
geological phenomenon: a natural phenomenon involving the structure or composition of the earth

seism (noun)	geological phenomenon (noun)
shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity	a natural phenomenon involving the structure or composition of the earth