dengue fever vs dengue

dengue fever and dengue both are nouns.

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

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

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

Other synonyms of dengue fever include breakbone fever, dandy fever.

dengue fever (noun)	dengue (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