larghetto vs opus

larghetto and opus both are nouns.

Word	Noun	Adjective	Verb	Adverb
larghetto	Yes	Yes	No	No
opus	Yes	No	No	No

As nouns, opus is a hypernym of larghetto; that is, opus is a word with a broader meaning than larghetto:

larghetto: (music) a composition or passage played in a slow tempo slightly faster than largo but slower than adagio
opus: a musical work that has been created

Other hypernyms of larghetto include composition, musical composition, piece, piece of music.

larghetto (noun)	opus (noun)
(music) a composition or passage played in a slow tempo slightly faster than largo but slower than adagio	a musical work that has been created

larghetto (adjective)	opus (adjective)
(of tempo) less slow and broad than largo