germander speedwell vs veronica

germander speedwell and veronica both are nouns.

Word	Noun	Adjective	Verb	Adverb
germander speedwell	Yes	No	No	No
veronica	Yes	No	No	No

As nouns, veronica is a hypernym of germander speedwell; that is, veronica is a word with a broader meaning than germander speedwell:

germander speedwell: Old World plant with axillary racemes of blue-and-white flowers
veronica: any plant of the genus Veronica

Other hypernyms of germander speedwell include speedwell.

germander speedwell (noun)	veronica (noun)
Old World plant with axillary racemes of blue-and-white flowers	any plant of the genus Veronica