Shakiness and Tremolo

Shakiness noun - The quality or state of not being firmly fixed in position.

Tremolo and shakiness are semantically related. In some cases you can replace term "Tremolo" with "Shakiness", this nouns are similar.

Tremolo noun - (music) a tremulous effect produced by rapid repetition of a single tone or rapid alternation of two tones.

Shakiness and tremolo are semantically related. Sometimes you can use "Shakiness" instead a noun "Tremolo".