featherfoil vs hydrophyte

featherfoil and hydrophyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
featherfoil	Yes	No	No	No
hydrophyte	Yes	No	No	No

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

featherfoil: a plant of the genus Hottonia
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 featherfoil include aquatic plant, hydrophytic plant, water plant.

featherfoil (noun)	hydrophyte (noun)
a plant of the genus Hottonia	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