Cuban itch and Variola major

Cuban itch noun - A mild form of smallpox caused by a less virulent form of the virus.

Variola major and Cuban itch are semantically related. In some cases you can use "Variola major" instead a noun phrase "Cuban itch".

Variola major noun - A highly contagious viral disease characterized by fever and weakness and skin eruption with pustules that form scabs that slough off leaving scars.

Cuban itch and variola major are semantically related. Sometimes you can replace phrase "Cuban itch" with "Variola major", this phrases are similar.