Data validation is the process of ensuring that the data entered in a system is accurate, complete, and relevant. Some synonyms for data validation include data screening, data scrubbing, and data verification. Data screening is the process of filtering data to ensure that it meets certain criteria, while data scrubbing refers to the process of cleaning up errors and inconsistencies in data. Data verification involves checking the accuracy of data by comparing it to an external source. All these synonyms for data validation are important in ensuring that data is reliable and can be used effectively for analysis and decision-making.