quake vs seaquake

quake and seaquake both are nouns.

Word	Noun	Adjective	Verb	Adverb
quake	Yes	No	Yes	No
seaquake	Yes	No	No	No

As nouns, seaquake is a hyponym of quake; that is, seaquake is a word with a more specific, narrower meaning than quake:

quake: shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity
seaquake: an earthquake at the sea bed

quake (noun)	seaquake (noun)
shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity	an earthquake at the sea bed

quake (verb)	seaquake (verb)
shake with fast, tremulous movements
shake with seismic vibrations