water plant vs hydrophytic plant

water plant and hydrophytic plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
water plant	Yes	No	No	No
hydrophytic plant	Yes	No	No	No

As nouns, water plant and hydrophytic plant are synonyms defined as:

water plant and hydrophytic 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 synonyms of water plant include aquatic plant, hydrophyte.

water plant (noun)	hydrophytic plant (noun)
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	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