Background: A contract between Mr. X and company Y includes a list of tasks that the company needs to complete. In the middle of the project company Y discovers that a few more tasks are needed, that are not included in the original contract. I'm looking for the word that describes these tasks, and implies that they were deemed necessary after the contract was closed.

These are my options so far, and my reservations about them:

  • Addition(al) - doesn't convey the nature of these tasks, too generic.
  • Exception - essentially they are not any different from the original tasks, had they been included in the contract on time.
  • Extra - they are not extra, rather part of the necessary work scope.

Searches for each of these in M-W didn't provide me with something that hit the spot.

Example sentence

The Contract contains 10 tasks and 3 ___________ tasks.

Extra points if someone knows the construction industry term.

UPDATE: What I'm looking to describe is different from a Change Order or modification of existing tasks. It's something that wasn't considered in the original agreement. So far I feel amendment is the best option offered.

  • Perhaps concomitant (as a noun or adjective) might suit. Jun 25, 2019 at 13:30
  • This is really a legal question, and thus outside the scope of this site. Any answer to it is bound to be jurisdiction-specific.
    – jsw29
    Jun 26, 2019 at 15:47
  • They are called add-ons.
    – Phil Sweet
    Jun 26, 2019 at 21:36

1 Answer 1


When you change a contract like that, it's called modifying or amending the contract. Each set of terms added together is called an amendment. (It's also sometimes called an appendix, addendum, or rider, but those can also be portions added before the original signing.) If the amendment specifies tasks to be done, I don't know a specific word for such tasks, but you can say "The Contract contains thirteen tasks, ten in the original contract and three in the amendment(s) thereto."

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