American frogbit vs hydrophyte

American frogbit and hydrophyte both are nouns.

Word	Noun	Adjective	Verb	Adverb
American frogbit	Yes	No	No	No
hydrophyte	Yes	No	No	No

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

American frogbit: American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches
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 American frogbit include aquatic plant, hydrophytic plant, water plant.

American frogbit (noun)	hydrophyte (noun)
American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches	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