microseism vs earthquake

microseism and earthquake both are nouns.

Word	Noun	Adjective	Verb	Adverb
microseism	Yes	No	No	No
earthquake	Yes	No	No	No

As nouns, earthquake is a hypernym of microseism; that is, earthquake is a word with a broader meaning than microseism:

microseism: a small earthquake
earthquake: shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

Other hypernyms of microseism include quake, seism, temblor.

microseism (noun)	earthquake (noun)
a small earthquake	shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity
	a disturbance that is extremely disruptive