Camelpox and Variola

Camelpox noun - A viral disease of camels closely related to smallpox.

Variola and camelpox are semantically related. In some cases you can use "Variola" instead a noun "Camelpox".

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

Camelpox and variola are semantically related. Sometimes you can replace term "Camelpox" with "Variola", this nouns are similar.