leech vs practice of medicine

leech and practice of medicine both are nouns.

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

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

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