There are several synonyms for the term "subway fare," which is the fee paid to ride on public transportation systems such as trains, buses, or subways. These synonyms may vary depending on the region, but common ones include transit fare, metro fare, train fare, bus fare, and commuter fare. Some cities or countries may use unique terms, such as MRT fare in Singapore or underground fare in London. Regardless of the name, paying subway fare is an essential expense for commuters, and many transportation systems offer various payment options such as a flat rate, prepaid passes, or contactless payments to make the process more convenient for travelers.