barf vs sick

barf and sick both are nouns.

Word	Noun	Adjective	Verb	Adverb
barf	Yes	No	Yes	No
sick	Yes	Yes	Yes	No

As verbs, barf and sick are synonyms defined as:

barf (noun)	sick (noun)
the matter ejected in vomiting	people who are sick

barf (adjective)	sick (adjective)
	affected by an impairment of normal physical or mental function
	shockingly repellent; inspiring horror
	having a strong distaste from surfeit
	affected with madness or insanity
	deeply affected by a strong feeling
	(of light) lacking in intensity or brightness; dim or feeble
	feeling nausea; feeling about to vomit

barf (verb)	sick (verb)
eject the contents of the stomach through the mouth	eject the contents of the stomach through the mouth