sextet (n.)
- antistrophe
- band
- book
- brass
- burden
- canto
- chorus
- coaction
- collaboration
- collectivism
- collusion
- combo
- commensalism
- communalism
- communism
- community
- complicity
- concert
- concord
- concordance
- concurrence
- cooperation
- cooperativeness
- couplet
- distich
- duet
- duo
- ecumenicalism
- ecumenicism
- ecumenism
- ensemble
- envoi
- esprit
- fellowship
- group
- harmony
- hexad
- hexagon
- hexagram
- hexahedron
- hexameter
- hexapod
- line
- measure
- morale
- mutualism
- mutuality
- octave
- octet
- orchestra
- quartet
- quatrain
- quintet
- reciprocity
- refrain
- septet
- sestet
- sextuplet
- sise
- six
- sixer
- solidarity
- stanza
- stave
- strain
- strings
- strophe
- syllable
- symbiosis
- symphony
- synergism
- synergy
- teamwork
- tercet
- terzetto
- trio
- triplet
- triumvirate
- troika
- verse
- woodwind