The term "world cup roster" refers specifically to the list of players selected to compete in a world cup tournament. Synonyms for this phrase could include "team roster," "squad selection," or "player lineup." These alternative terms could be used to describe the same concept, but with slightly different language. A team roster, for example, might refer more broadly to the entire group of players on a team, while a squad selection might emphasize the process of choosing the players who will represent a country or club. Ultimately, the choice of synonym will depend on the context and the speaker's preference.