Variola and White pox

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.

White pox and variola are semantically related. In some cases you can replace phrase "White pox" with "Variola", this terms are similar.

White pox noun - A mild form of smallpox caused by a less virulent form of the virus.

Variola and white pox are semantically related. You can use "Variola" instead a noun phrase "White pox".