practice of medicine vs infuse

practice of medicine is a noun but infuse is not a noun.

Word	Noun	Adjective	Verb	Adverb
practice of medicine	Yes	No	No	No
infuse	No	No	Yes	No

practice of medicine (noun)	infuse (noun)
the learned profession that is mastered by graduate training in a medical school and that is devoted to preventing or alleviating or curing diseases and injuries

practice of medicine (verb)	infuse (verb)
	introduce into the body through a vein, for therapeutic purposes
	let sit in a liquid to extract a flavor or to cleanse
	fill, as with a certain quality
	undergo the process of infusion
	teach and impress by frequent repetitions or admonitions