ripple-grass vs narrow-leaved plantain

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

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

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

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

Other synonyms of ripple-grass include buckthorn, English plantain, Plantago lanceolata, ribgrass, ribwort.

ripple-grass (noun)	narrow-leaved plantain (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