moneylender vs loan shark

moneylender and loan shark both are nouns.

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

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

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

Other synonyms of moneylender include shylock, usurer.

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