vibration vs tremolo

vibration and tremolo both are nouns.

Word	Noun	Adjective	Verb	Adverb
vibration	Yes	No	No	No
tremolo	Yes	No	No	No

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

vibration: a shaky motion
tremolo: (music) a tremulous effect produced by rapid repetition of a single tone or rapid alternation of two tones

Other hyponyms of vibration include tremor.

vibration (noun)	tremolo (noun)
the act of vibrating	vocal vibrato especially an excessive or poorly controlled one
a distinctive emotional aura experienced instinctively	(music) a tremulous effect produced by rapid repetition of a single tone or rapid alternation of two tones
(physics) a regular periodic variation in value about a mean
a shaky motion