shylock vs loan shark

shylock and loan shark both are nouns.

Word	Noun	Adjective	Verb	Adverb
shylock	Yes	No	No	No
loan shark	Yes	No	No	No

As nouns, shylock and loan shark are synonyms defined as:

shylock and loan shark: someone who lends money at excessive rates of interest

Other synonyms of shylock include moneylender, usurer.

shylock (noun)	loan shark (noun)
someone who lends money at excessive rates of interest	someone who lends money at excessive rates of interest