Hydrophyte and Water chestnut

Hydrophyte 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.

Water chestnut and hydrophyte are semantically related. In some cases you can replace phrase "Water chestnut" with "Hydrophyte", this terms are similar.

Water chestnut noun - A plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits.

Hydrophyte and water chestnut are semantically related. You can use "Hydrophyte" instead a noun phrase "Water chestnut".