red valerian vs Centranthus ruber

red valerian and Centranthus ruber both are nouns.

Word	Noun	Adjective	Verb	Adverb
red valerian	Yes	No	No	No
Centranthus ruber	Yes	No	No	No

As nouns, red valerian and Centranthus ruber are synonyms defined as:

red valerian and Centranthus ruber: European herb with small fragrant crimson or white spurred flowers

Other synonyms of red valerian include French honeysuckle.

red valerian (noun)	Centranthus ruber (noun)
European herb with small fragrant crimson or white spurred flowers	European herb with small fragrant crimson or white spurred flowers