The phrase "transport to and fro" can be replaced with several synonyms, depending on the context. One possible synonym for this phrase is "shuttle," which refers to a vehicle or service that moves people or goods back and forth between two locations. Another alternative is "commute," which describes the process of traveling regularly between two places, such as from home to work or school. Other possible synonyms include "convey," "transfer," "freight," "haul," "move," and "shift," all of which reflect various aspects of transporting things or people from one place to another and back again.