Hydrophyte and Swamp plant

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.

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

Swamp plant noun - A semiaquatic plant that grows in soft wet land; most are monocots: sedge, sphagnum, grasses, cattails, etc; possibly heath.

Hydrophyte and swamp plant are semantically related. You can use "Hydrophyte" instead a noun phrase "Swamp plant".