Concomitant
Part of speech: adjective
Definition: Following as a consequence, especially secondarily or incidentally.
Part of speech: noun
Definition: A concomitant event or situation.
Accompaniment
Part of speech: noun
Definition: That which gives support or adds to the background in music, or adds for ornamentation.That which accompanies; something that attends as a circumstance, or which is added to give greater completeness to the principal thing, or by way of ornament, or for the sake of symmetry.A part performed by instruments, accompanying another part or parts performed by voices; the subordinate part, or parts, accompanying the voice or a principal instrument; also, the harmony of a figured bass.