typhus vs rickettsiosis

typhus and rickettsiosis both are nouns.

Word	Noun	Adjective	Verb	Adverb
typhus	Yes	No	No	No
rickettsiosis	Yes	No	No	No

As nouns, rickettsiosis is a hypernym of typhus; that is, rickettsiosis is a word with a broader meaning than typhus:

typhus: rickettsial disease transmitted by body lice and characterized by skin rash and high fever
rickettsiosis: infectious disease caused by ticks or mites or body lice infected with rickettsial bacteria

Other hypernyms of typhus include rickettsial disease.

typhus (noun)	rickettsiosis (noun)
rickettsial disease transmitted by body lice and characterized by skin rash and high fever	infectious disease caused by ticks or mites or body lice infected with rickettsial bacteria