frogbit vs aquatic plant

frogbit and aquatic plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
frogbit	Yes	No	No	No
aquatic plant	Yes	No	No	No

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

frogbit: European floating plant with roundish heart-shaped leaves and white flowers
aquatic plant: 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 frogbit include hydrophyte, hydrophytic plant, water plant.

frogbit (noun)	aquatic plant (noun)
European floating plant with roundish heart-shaped leaves and white flowers	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