Various.

A deed is any document affecting title, that is, proof of ownership, of the land in question. The land may or may not have buildings upon it. Common types of deed include conveyances, mortgages, bonds, grants of easements, wills and administrations.

An assignment of term, or assignment to attend the inheritance, was an assignment of the remaining term of years in a mortgage to a trustee after the mortgage itself has been redeemed. An assignment of a lease is the transfer of the rights laid out in the lease to another party, usually for a consideration (a sum of money).

Abstract of title is a summary of prior ownership of a property, drawn up by solicitors. Such an abstract may go back several hundred years or just a few months, and was usually drawn up just prior to a sale.

Lease and release was the most common method of conveying freehold property from the later seventeenth century onwards, before the introduction of the modern conveyance in the late nineteenth century. The lease was granted for a year (sometimes six months), then on the following day the lessor released their right of ownership in return for the consideration (the thing for which land was transferred from one party to another, usually, of course, a sum of money).

Source: British Records Association Guidelines 3: How to interpret deeds (available online).