cough out vs spit up

cough out and spit up both are verbs.

Word	Noun	Adjective	Verb	Adverb
cough out	No	No	Yes	No
spit up	No	No	Yes	No

As verbs, cough out and spit up are synonyms defined as:

cough out and spit up: discharge (phlegm or sputum) from the lungs and out of the mouth

Other synonyms of cough out include cough up, expectorate, spit out.

cough out (verb)	spit up (verb)
discharge (phlegm or sputum) from the lungs and out of the mouth	discharge (phlegm or sputum) from the lungs and out of the mouth
	give reluctantly