variola minor vs variola virus

variola minor and variola virus both are nouns.

Word	Noun	Adjective	Verb	Adverb
variola minor	Yes	No	No	No
variola virus	Yes	No	No	No

As nouns, variola virus is a hypernym of variola minor; that is, variola virus is a word with a broader meaning than variola minor:

variola minor: a type of smallpox virus that has a fatality rate of about 1 percent
variola virus: the virus that causes smallpox in humans; can be used as a bioweapon

Other hypernyms of variola minor include smallpox virus.

variola minor (noun)	variola virus (noun)
a type of smallpox virus that has a fatality rate of about 1 percent	the virus that causes smallpox in humans; can be used as a bioweapon
a mild form of smallpox caused by a less virulent form of the virus