yellow jack vs black vomit

yellow jack and black vomit both are nouns.

Word	Noun	Adjective	Verb	Adverb
yellow jack	Yes	No	No	No
black vomit	Yes	No	No	No

As nouns, yellow jack and black vomit are synonyms defined as:

yellow jack and black vomit: caused by a flavivirus transmitted by a mosquito

Other synonyms of yellow jack include yellow fever.

yellow jack (noun)	black vomit (noun)
fish of western Atlantic and Gulf of Mexico, also known as the coolihoo (Caranx bartholomaei)	caused by a flavivirus transmitted by a mosquito
yellow flag hoist on a ship in quarantine
caused by a flavivirus transmitted by a mosquito