dengue vs dengue fever

dengue and dengue fever both are nouns.

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

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

dengue and dengue fever: an infectious disease of the tropics transmitted by mosquitoes and characterized by rash and aching head and joints

Other synonyms of dengue include breakbone fever, dandy fever.

dengue (noun)	dengue fever (noun)
an infectious disease of the tropics transmitted by mosquitoes and characterized by rash and aching head and joints	an infectious disease of the tropics transmitted by mosquitoes and characterized by rash and aching head and joints