Words from
trill
    sing or play with a tremulous or vibratory sound.
    
    Source: Sophie's World - Jostein Gaarder
    
    Usage Example: Birds trill their melodious tones
    
  conglomerate
    a number of things or parts that are put or grouped together to form a whole but remain distinct entities.
    
    Source: Sophie's World - Jostein Gaarder