accompaniment

(n) an event or situation that happens at the same time as or in connection with another concomitant, co-occurrence, attendant,
(n) a musical part (vocal or instrumental) that supports or provides background for other musical parts musical accompaniment, backup, support,
(n) something added to complete or embellish or make perfect
- a fine wine is a perfect complement to the dinner
- wild rice was served as an accompaniment to the main dish
complement,
(n) the act of accompanying someone or something in order to protect them escort,

concomitant co-occurrence attendant musical accompaniment backup support complement escort