Waiver
The deliberate and voluntary relinquishment or surrender of a claim, right, or privilege.
Walk-through
The buyer’s final inspection of a property which is being purchased is called a walk-through. This final inspectiongenerally takes place on the day of closing or one day prior to ensure all the conditions of the sale have been met.
Warranty
In real estate, warranty refers a document certifying clear title a property.
Witness
An individual who signs his or her name to a document for the purpose of attesting to its authenticity. For example, a witness is usually required to sign a deed, will or other legal document.
Workout
A type of mortgage where basic terms such as interest rate, term, and monthly payment are altered to prevent foreclosure. This is not a typical practice in Canada.
Wraparound Mortgage- [Updated]
A form of secondary financing in which a seller extends to a purchaser a junior mortgage which wraps around and exists in addition to one or more superior mortgages. Under a wrap, a seller accepts a promissory notefrom the buyer for the amount due on the underlying mortgage plus an amount up to the remaining purchase money balance. {source: Wikipedia}
Posted by: Deya Bautista - Real Estate Broker working as part of the McGill Immobilier team. Specializing in high end condos in downtown and Old Montreal. For buying or selling contact Deya at: 514.917.7889 
good work to make a glossary of real estate terms for beginning investors to understand more about RE investing.