As verbs the difference between loan and loin
is that
loan is to lend (something) to (someone) while
loin is .
As a noun loan
is (banking|finance) a sum of money or other valuables or consideration that an individual, group or other legal entity borrows from another individual, group or legal entity (the latter often being a financial institution) with the condition that it be returned or repaid at a later date (sometimes with interest) or
loan can be (scotland) a lonnen.