narrow-leaved plantain vs ribgrass

narrow-leaved plantain and ribgrass both are nouns.

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

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

narrow-leaved plantain and ribgrass: 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, ribwort, ripple-grass.

narrow-leaved plantain (noun)	ribgrass (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