seismic disturbance vs seism

seismic disturbance and seism both are nouns.

Word	Noun	Adjective	Verb	Adverb
seismic disturbance	Yes	No	No	No
seism	Yes	No	No	No

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

seismic disturbance: an instance of agitation of the earth's crust
seism: shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

Other hypernyms of seismic disturbance include earthquake, quake, temblor.

seismic disturbance (noun)	seism (noun)
an instance of agitation of the earth's crust	shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity