ribwort vs narrow-leaved plantain

ribwort and narrow-leaved plantain both are nouns.

Word	Noun	Adjective	Verb	Adverb
ribwort	Yes	No	No	No
narrow-leaved plantain	Yes	No	No	No

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

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

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

ribwort (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