pyramid bugle vs bugleweed

pyramid bugle and bugleweed both are nouns.

Word	Noun	Adjective	Verb	Adverb
pyramid bugle	Yes	No	No	No
bugleweed	Yes	No	No	No

As nouns, bugleweed is a hypernym of pyramid bugle; that is, bugleweed is a word with a broader meaning than pyramid bugle:

pyramid bugle: European evergreen carpeting perennial
bugleweed: any of various low-growing annual or perennial evergreen herbs native to Eurasia; used for ground cover

Other hypernyms of pyramid bugle include bugle.

pyramid bugle (noun)	bugleweed (noun)
European evergreen carpeting perennial	any of various low-growing annual or perennial evergreen herbs native to Eurasia; used for ground cover
	a mildly narcotic and astringent aromatic herb having small whitish flowers; eastern United States