American brooklime vs Veronica americana

American brooklime and Veronica americana both are nouns.

Word	Noun	Adjective	Verb	Adverb
American brooklime	Yes	No	No	No
Veronica americana	Yes	No	No	No

As nouns, American brooklime and Veronica americana are synonyms defined as:

American brooklime and Veronica americana: plant of western North America and northeastern Asia having prostrate stems with dense racemes of pale violet to lilac flowers

Other synonyms of American brooklime include brooklime.

American brooklime (noun)	Veronica americana (noun)
plant of western North America and northeastern Asia having prostrate stems with dense racemes of pale violet to lilac flowers	plant of western North America and northeastern Asia having prostrate stems with dense racemes of pale violet to lilac flowers