What does "seism" mean?

A shaking of the Earth's surface; an earthquake or tremor.

What is a synonym for "seism"?

Common synonyms include: earthquake, quake, disruption, seismic event, shock, temblor.

/ˈsaɪzəm/ noun

noun ·Rare ·Advanced level

Noun

1
A shaking of the Earth's surface; an earthquake or tremor.
2
shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity wordnet

From Ancient Greek σεισμός (seismós, “shaking; earthquake”).