Camelpox and Smallpox

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

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

Smallpox 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 smallpox are semantically related. Sometimes you can replace term "Camelpox" with "Smallpox", this nouns are similar.