accompaniment

Noun

• the act of accompanying someone or something in order to protect them

• 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
    

• a musical part (vocal or instrumental) that supports or provides background for other musical parts

• an event or situation that happens at the same time as or in connection with another

Related words

• Synonyms: 
  escort , complement , musical accompaniment , backup , support , concomitant , attendant , co-occurrence