maraca vs percussion instrument

maraca and percussion instrument both are nouns.

Word	Noun	Adjective	Verb	Adverb
maraca	Yes	No	No	No
percussion instrument	Yes	No	No	No

As nouns, percussion instrument is a hypernym of maraca; that is, percussion instrument is a word with a broader meaning than maraca:

maraca: a percussion instrument consisting of a hollow gourd containing pebbles or beans; often played in pairs
percussion instrument: a musical instrument in which the sound is produced by one object striking another

Other hypernyms of maraca include percussive instrument.

maraca (noun)	percussion instrument (noun)
a percussion instrument consisting of a hollow gourd containing pebbles or beans; often played in pairs	a musical instrument in which the sound is produced by one object striking another