expectorate vs ptyalize

expectorate and ptyalize both are verbs.

Word	Noun	Adjective	Verb	Adverb
expectorate	No	No	Yes	No
ptyalize	No	No	Yes	No

As verbs, ptyalize is a hyponym of expectorate; that is, ptyalize is a word with a more specific, narrower meaning than expectorate:

expectorate: discharge (phlegm or sputum) from the lungs and out of the mouth
ptyalize: expel or eject (saliva or phlegm or sputum) from the mouth

Other hyponyms of expectorate include cough, ptyalise, spew, spit, spue, spit out, splutter, sputter.

expectorate (verb)	ptyalize (verb)
discharge (phlegm or sputum) from the lungs and out of the mouth	expel or eject (saliva or phlegm or sputum) from the mouth
clear out the chest and lungs