"tremors" in the noun sense
1. tremor, shudder
an involuntary vibration (as if from illness or fear)
2. tremor, earth tremor, microseism
a small earthquake
3. tremor
shaking or trembling (usually resulting from weakness or stress or disease)
"tremors" in the verb sense
1. tremor, quake
shake with seismic vibrations
"The earth was quaking"
Source: WordNet® (An amazing lexical database of English)
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