One who completes something.

plural of completer

plural of completeness

(obsolete) Act of completing or perfecting; completion.

Having some specified thing as an additional feature.

The act or state of being or making something complete; conclusion, accomplishment. / (law) The conclusion of an act of conveyancing concerning the sale of a property.

present participle of complete

plural of completion

That can be completed. / (mathematics, of a partial algebra) That can be expanded to a total algebra

Making complete.