In British law, Words of purchase are words the grantor uses to designate the grantee on a deed, will, or probate that determine who is to receive the interest.The term words of purchase is a technical conveyancing expression, a term of art in real property law that has nothing to do with the ordinary meanings of the word "purchase." The word purchase in the expression means that real property is being transferred by deed or will, not inherited through the laws of descent and distribution.