If you want to be a loan shark, you’d better check your dentures! It’s commonly a noun but is also a well-established intransitive verb:

USAGE NOTE: The verb loan is well established in American usage and cannot be considered incorrect. The frequent objections to the form by American grammarians may have originated from a provincial deference to British critics, who long ago labeled the usage a typical Americanism. Loan is, however, used to describe only physical transactions, as of money or goods; for figurative transactions, lend is correct: Distance lends enchantment. The allusions lend the work a classical tone.

C. American Heritage