water starwort vs hydrophyte

water starwort and hydrophyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
water starwort	Yes	No	No	No
hydrophyte	Yes	No	No	No

As nouns, hydrophyte is a hypernym of water starwort; that is, hydrophyte is a word with a broader meaning than water starwort:

water starwort: any of several aquatic plants having a star-shaped rosette of floating leaves; America, Europe and Asia
hydrophyte: a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth

Other hypernyms of water starwort include aquatic plant, hydrophytic plant, water plant.

water starwort (noun)	hydrophyte (noun)
any of several aquatic plants having a star-shaped rosette of floating leaves; America, Europe and Asia	a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth