Other hyponyms of opus include
morceau,
sheet music,
arrangement,
musical arrangement,
realisation,
realization,
intermezzo,
introit,
solo,
duet,
duette,
duo,
trio,
quartet,
quartette,
quintet,
quintette,
sestet,
sextet,
sextette,
septet,
septette,
octet,
octette,
bagatelle,
divertimento,
serenade,
canon,
etude,
idyl,
idyll,
pastoral,
pastorale,
sonata,
toccata,
musical passage,
passage,
movement,
larghetto,
suite,
symphonic poem,
tone poem,
medley,
pastiche,
potpourri,
nocturne,
notturno,
song,
vocal,
study,
capriccio,
motet,
program music,
programme music,
incidental music,
csardas,
czardas.