Cross-matching is a term that refers to the process of comparing two or more things in order to find similarities or differences between them. Synonyms for cross-matching include cross-referencing, comparing, correlating, matching, aligning, pairing, juxtaposing, and relating. These terms all describe the act of examining two sets of data or information to determine how they are related. Each synonym has its own nuance and can be used in different contexts depending on the situation. Overall, when it comes to comparing two or more sets of data, there are many synonyms for cross-matching that can be used to accurately convey the process involved.