typhus fever vs typhus

typhus fever and typhus both are nouns.

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

As nouns, typhus fever and typhus are synonyms defined as:

typhus fever and typhus: rickettsial disease transmitted by body lice and characterized by skin rash and high fever

typhus fever (noun)	typhus (noun)
rickettsial disease transmitted by body lice and characterized by skin rash and high fever	rickettsial disease transmitted by body lice and characterized by skin rash and high fever