| Word | Definitions | Synonyms |
|---|---|---|
| hirudinean | (noun) carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end | Synonyms: bloodsucker, leech |
| platyctenean | (noun) ctenophore have long tentacles and flattened body | - |
| subterranean | (adjective) lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed) | Synonyms: subterraneous, ulterior |
| (adjective) being or operating under the surface of the earth | Synonyms: subterraneous |