English plantain vs ribgrass

English plantain and ribgrass both are nouns.

Word	Noun	Adjective	Verb	Adverb
English plantain	Yes	No	No	No
ribgrass	Yes	No	No	No

As nouns, English plantain and ribgrass are synonyms defined as:

English plantain and ribgrass: an Old World plantain with long narrow ribbed leaves widely established in temperate regions

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

English 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