When it comes to business contracts, the term "sub-contracts" often refers to agreements made between a main contractor and a secondary party who will complete a portion of the work. However, there are several synonyms for sub-contracts that can be useful in different contexts. Some options might include "outsourcing agreements," "participating contracts," or "collaborative arrangements." These terms can help convey a slightly different meaning or tone in certain situations. For example, "outsourcing agreements" might emphasize the idea that the secondary party is providing a specific service or skill, while "collaborative arrangements" could highlight a more equal partnership between the two parties. Ultimately, the right synonym for sub-contracts will depend on the specific details of the business arrangement.