tape grass vs Vallisneria spiralis

tape grass and Vallisneria spiralis both are nouns.

Word	Noun	Adjective	Verb	Adverb
tape grass	Yes	No	No	No
Vallisneria spiralis	Yes	No	No	No

As nouns, tape grass and Vallisneria spiralis are synonyms defined as:

tape grass and Vallisneria spiralis: submerged aquatic plant with ribbonlike leaves; Old World and Australia

Other synonyms of tape grass include eelgrass, wild celery.

tape grass (noun)	Vallisneria spiralis (noun)
submerged aquatic plant with ribbonlike leaves; Old World and Australia	submerged aquatic plant with ribbonlike leaves; Old World and Australia