Guinea worm and Roundworm

Guinea worm noun - Parasitic roundworm of India and Africa that lives in the abdomen or beneath the skin of humans and other vertebrates.

Roundworm and guinea worm are semantically related. In some cases you can use "Roundworm" instead a noun phrase "Guinea worm".

Roundworm noun - Unsegmented worms with elongated rounded body pointed at both ends; mostly free-living but some are parasitic.

Guinea worm and roundworm are semantically related. Sometimes you can replace phrase "Guinea worm" with "Roundworm", this terms are similar.