Collateralized is a financial term that refers to the use of an asset to secure a loan or other financial instrument. There are several synonyms for this term, including secured, guaranteed, covered, and backed. These words all convey the idea that an asset or property has been used as a guarantee for a financial transaction. Other synonyms for collateralized include pledged, mortgaged, and assured. These terms are all commonly used in the world of finance to indicate that a loan or investment is secured by a tangible asset or property. Overall, collateralized is an important term in the financial world, and its many synonyms help to convey the same concept in different ways.