toccata vs musical composition

toccata and musical composition both are nouns.

Word	Noun	Adjective	Verb	Adverb
toccata	Yes	No	No	No
musical composition	Yes	No	No	No

As nouns, musical composition is a hypernym of toccata; that is, musical composition is a word with a broader meaning than toccata:

toccata: a baroque musical composition (usually for a keyboard instrument) with full chords and rapid elaborate runs in a rhythmically free style
musical composition: a musical work that has been created

Other hypernyms of toccata include composition, opus, piece, piece of music.

toccata (noun)	musical composition (noun)
a baroque musical composition (usually for a keyboard instrument) with full chords and rapid elaborate runs in a rhythmically free style	a musical work that has been created