spit up vs expectorate

spit up and expectorate both are verbs.

Word	Noun	Adjective	Verb	Adverb
spit up	No	No	Yes	No
expectorate	No	No	Yes	No

As verbs, spit up and expectorate are synonyms defined as:

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

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

spit up (verb)	expectorate (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	clear out the chest and lungs