The word "incompletenesses" refers to the state of being incomplete or not finished. Some antonyms for this word could be completeness, entirety, perfection, thoroughness, or conclusiveness. These words signify a sense of wholeness or entirety, indicating that there is no room for lack or deficiency. An opposite meaning of incompletenesses could be finished, accomplished, finalized, or fulfilled. These terms convey the notion of completion, suggesting that a task has been completed satisfactorily. Therefore, the antonyms for incompletenesses can be used to describe a sense of wholeness, fulfillment, or accomplishment.