West Indian smallpox vs variola

West Indian smallpox and variola both are nouns.

Word	Noun	Adjective	Verb	Adverb
West Indian smallpox	Yes	No	No	No
variola	Yes	No	No	No

As nouns, variola is a hypernym of West Indian smallpox; that is, variola is a word with a broader meaning than West Indian smallpox:

West Indian smallpox: a mild form of smallpox caused by a less virulent form of the virus
variola: a highly contagious viral disease characterized by fever and weakness and skin eruption with pustules that form scabs that slough off leaving scars

Other hypernyms of West Indian smallpox include smallpox, variola major.

West Indian smallpox (noun)	variola (noun)
a mild form of smallpox caused by a less virulent form of the virus	a highly contagious viral disease characterized by fever and weakness and skin eruption with pustules that form scabs that slough off leaving scars