Veronica peregrina vs speedwell

Veronica peregrina and speedwell both are nouns.

Word	Noun	Adjective	Verb	Adverb
Veronica peregrina	Yes	No	No	No
speedwell	Yes	No	No	No

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

Veronica peregrina: North American annual with small white flowers widely naturalized as a weed in South America and Europe
speedwell: any plant of the genus Veronica

Other hypernyms of Veronica peregrina include veronica.

Veronica peregrina (noun)	speedwell (noun)
North American annual with small white flowers widely naturalized as a weed in South America and Europe	any plant of the genus Veronica