An instrumental composition that doesn't adhere to rules for any specific musical form and is played with improvisation.
Roget 415:
music;
concert;
strain,
tune,
air;
melody
etc.
413;
aria,
arietta†;
piece of music [Fr.],
work,
number,
opus;
sonata;
rondo,
rondeau [Fr.];
pastorale,
cavatina†,
roulade†,
fantasia,
concerto,
overture,
symphony,
variations,
cadenza;
cadence;
fugue,
canon,
quodlibet,
serenade,
notturno [It],
dithyramb;
opera,
operetta;
oratorio;
composition,
movement;
stave;
passamezzo [It],
toccata,
Vorspiel [G.].
instrumental music;
full score;
minstrelsy,
tweedledum and tweedledee,
band,
orchestra;
concerted piece [Fr.],
potpourri,
capriccio.
vocal music,
vocalism†;
chaunt,
chant;
psalm,
psalmody;
hymn;
song
etc.
(poem)
597;
canticle,
canzonet†,
cantata,
bravura,
lay,
ballad,
ditty,
carol,
pastoral,
recitative,
recitativo†,
solfeggio†.
Lydian measures;
slow music,
slow movement;
adagio
etc.
adv.;
minuet;
siren strains,
soft music,
lullaby;
dump;
dirge
etc.
(lament)
839;
pibroch†;
martial music,
march;
dance music;
waltz
etc.
(dance)
840.
solo,
duet,
duo,
trio;
quartet,
quartett†;
septett†;
part song,
descant,
glee,
madrigal,
catch,
round,
chorus,
chorale;
antiphon†,
antiphony;
accompaniment,
second,
bass;
score;
bourdon†,
drone,
morceau†,
terzetto†.
composer
etc.
413;
musician
etc.
416.
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Roget 608:
caprice,
fancy,
humor;
whim,
whimsy,
whimsey†,
whimwham†;
crotchet,
capriccio,
quirk,
freak,
maggot,
fad,
vagary,
prank,
fit,
flimflam,
escapade,
boutade [Fr.],
wild-goose chase;
capriciousness
etc.
adj.;
kink.
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