stake, interest - (law) a right or legal share of something; a financial involvement with something; "they have interests all over the world"; "a stake in the company's future"

pledge - a deposit of personal property as security for a debt; "his saxophone was in pledge"

mortgage - a conditional conveyance of property as security for the repayment of a loan

conditional sale - a security interest taken by the seller in return for credit

collateral - a security pledged for the repayment of a loan

lien - the right to take another's property if an obligation is not discharged