Tremblor is a common term used to refer to an earthquake or shaking of the ground. However, there are several other synonyms for this word that can also be used to indicate similar movements or vibrations. These synonyms include shudder, quiver, tremor, vibration, shake, and jolt. Each of these terms can be used in different contexts to describe the movement, intensity, or duration of the shaking. While tremblor may be the most commonly used term, incorporating these other synonyms into your writing can add variety and depth to your description of shaking or seismic activity.