Again, this will come down to the lender you are borrowing through. But to give you an idea, there are a number of assets people generally use as security:
New or used car
Home equity
Term deposit
Other valuable assets (jewellery, high-value art, family heirlooms, etc)
Depending on how much you are looking to borrow and who you are looking to borrow through, the asset you can offer as security may vary.