narrow-leaved plantain vs ripple-grass

narrow-leaved plantain and ripple-grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
narrow-leaved plantain	Yes	No	No	No
ripple-grass	Yes	No	No	No

As nouns, narrow-leaved plantain and ripple-grass are synonyms defined as:

narrow-leaved plantain and ripple-grass: an Old World plantain with long narrow ribbed leaves widely established in temperate regions

Other synonyms of narrow-leaved plantain include buckthorn, English plantain, Plantago lanceolata, ribgrass, ribwort.

narrow-leaved plantain (noun)	ripple-grass (noun)
an Old World plantain with long narrow ribbed leaves widely established in temperate regions	an Old World plantain with long narrow ribbed leaves widely established in temperate regions