practice of medicine vs leech

practice of medicine and leech both are nouns.

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

practice of medicine (noun)	leech (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	carnivorous or bloodsucking aquatic or terrestrial worms typically having a sucker at each end
	a follower who hangs around a host (without benefit to the host) in hope of gain or advantage

practice of medicine (verb)	leech (verb)
	draw blood