| HORNWORT | Aquatic plant of the genus Ceratophyllum (8) |
| EELGRASS | Submerged aquatic plant of the genus Vallisneria (8) |
| LILYPAD | The floating leaf of an aquatic plant of the Nymphaea genus (4,3) |
| LOTUS | Aquatic plant of the genus Nelumbo, of the water lily family. (5) |
| PAPYRUS | Name a tall aquatic plant of the sedge family of the Nile valley (7) |
| BLADDERWORT | Aquatic plant of the genus Utricularia whose leaves trap minute aquatic animals |
| WATERWEED | General term for an aquatic plant of the genus Elodea (9) |
| QUILLWORT | Aquatic plant of the genus Isoetes (9) |
| NAIAD | Dragonfly larva, or aquatic plant of the najas family (5) |
| ELODEA | Genus of aquatic plants of the family Hydrocharitaceae commonly known as the waterweeds (6) |
| ALGA | Simple, non-flowering, and typically aquatic plant of a large assemblage, including seaweed (4) |
| CATSTAIL | Aquatic plant foreign to the Isle of Man? |
| EMERGENT | Arrowhead, cat's-tail, marsh marigold, pickerel-weed, reed or other aquatic plant named for "springing forth from the plunge/dip", aka water (8) |
| PONDWEED | Aquatic plant, deep down, tangled (8) |
| HYACINTH | Aquatic plant (8) |
| DUCKWEED | Floating aquatic plant (8) |
| OENANTHE | Aquatic plant with hemlock-like foliage, also called horsebane (8) |
| BAYGRASS | Aquatic plant that reduces erosion |
| EMERSE | Of the leaves of an aquatic plant, rising above the surface of the water (6) |
| CARAGEENPONDWEED | American aquatic plant used in pools as an oxygenator (8,8) |
