As nouns the difference between bugle and trombone
is that
bugle is a horn used by hunters while
trombone is a musical instrument in the brass family, having a cylindrical bore, and usually a sliding tube (but sometimes piston valves, and rarely both). Most often refers to the tenor trombone, which is the most common type of trombone and has a fundamental tone of B♭ˌ (contra B♭).
As a verb bugle
is to announce, sing, or cry in the manner of a musical bugle.
As an adjective bugle
is jet-black.