Plantago lanceolata vs narrow-leaved plantain

Plantago lanceolata and narrow-leaved plantain both are nouns.

Word	Noun	Adjective	Verb	Adverb
Plantago lanceolata	Yes	No	No	No
narrow-leaved plantain	Yes	No	No	No

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

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

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

Plantago lanceolata (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