septette
Heptateuch
Spenserian stanza
antistrophe
bipartisanship
book
burden
canto
chorus
coaction
coadjuvancy
coadministration
coagency
cochairmanship
codirectorship
collaboration
collaborativeness
collectivism
collusion
commensalism
common effort
common enterprise
communalism
communism
communitarianism
community
complicity
concert
concord
concordance
concurrence
cooperation
cooperativeness
couplet
distich
duet
duettino
duo
duumvirate
ecumenicalism
ecumenicism
ecumenism
ensemble music
ensemble singing
envoi
epode
esprit
esprit de corps
fellow feeling
fellowship
harmony
septuor
assemblage
composition
digit
figure
gathering
musical composition
musical group
musical organisation
musical organization
opus
piece
piece of music
set
alexandrine
aprosodia
bolero
concerto
distrait
duad
duodecimal
fluffiness
gift-loan
hydrides
monad
octet
orchestration
polonaise
quartet
quartette
quatrain
sestet
sextet
sextuple
singlet
triplet
watercolour