erect bugle vs bugleweed

erect bugle and bugleweed both are nouns.

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

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

erect bugle: upright rhizomatous perennial with bright blue flowers; southern Europe
bugleweed: any of various low-growing annual or perennial evergreen herbs native to Eurasia; used for ground cover

Other hypernyms of erect bugle include bugle.

erect bugle (noun)	bugleweed (noun)
upright rhizomatous perennial with bright blue flowers; southern Europe	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