pibroch vs military music

pibroch and military music both are nouns.

Word	Noun	Adjective	Verb	Adverb
pibroch	Yes	No	No	No
military music	Yes	No	No	No

As nouns, military music is a hypernym of pibroch; that is, military music is a word with a broader meaning than pibroch:

pibroch: martial music with variations; to be played by bagpipes
military music: brisk marching music suitable for troops marching in a military parade

Other hypernyms of pibroch include martial music, military march.

pibroch (noun)	military music (noun)
martial music with variations; to be played by bagpipes	brisk marching music suitable for troops marching in a military parade