The term 'leech, e.g.' can be solved by three different crossword solutions: 'WORM' (4 letters), 'BLOODSUCKER' (11 letters), and 'APOD' (4 letters). Leeches are segmented worms that belong to the phylum Annelida and the sub-class Hirudinea. They are known for their ability to attach to a host and suck its blood. The term 'APOD' is derived from the Greek word for 'FOOTLESS' and refers to the leech's lack of legs. Leeches have been used in traditional medicine for centuries, and are still used today in some parts of the world.