The act of cooperating.
Association for mutual benefit, such as for purposes of production or purchase.
Active help from a person, organization, etc., such as an orderly sharing of space or resources.
Agreement or accord.
A literary work which brings together or arranges systematically parallel passages of historians respecting the same events, and shows their agreement or consistency.
A pleasing combination of elements, or arrangement of sounds.
The relationship between two distinct musical pitches (musical pitches being frequencies of vibration which produce audible sound) played simultaneously.
The academic study of chords.
Two or more notes played simultaneously to produce a chord.