bugloss vs anchusa

bugloss and anchusa both are nouns.

Word	Noun	Adjective	Verb	Adverb
bugloss	Yes	No	No	No
anchusa	Yes	No	No	No

As nouns, anchusa is a hypernym of bugloss; that is, anchusa is a word with a broader meaning than bugloss:

bugloss: perennial or biennial herb cultivated for its delicate usually blue flowers
anchusa: any of various Old World herbs of the genus Anchusa having one-sided clusters of trumpet-shaped flowers

bugloss (noun)	anchusa (noun)
perennial or biennial herb cultivated for its delicate usually blue flowers	any of various Old World herbs of the genus Anchusa having one-sided clusters of trumpet-shaped flowers
widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States