A title track is a song on an album or soundtrack that shares its name with the title of said album or soundtrack. If you're searching for alternative ways to refer to a title track, there are several synonyms to choose from. Some possible options include "lead single," "opening number," "album opener," "named track," "eponymous song," or simply "title song." Additionally, if you want to refer to a track that is particularly popular or well-known, you could use phrases such as "signature song" or "fan favorite." Ultimately, the choice of synonym will depend on the context and the specific album or soundtrack in question.