Riders are people who use public transportation such as buses, trains, and subways. The term 'riders' can also refer to people who use other forms of transportation such as bicycles or motorcycles. The crossword solutions for the term 'riders' are 'fares' (5 letters), 'ADDENDA' (7 letters), 'EASY' (4 letters), and 'addons' (6 letters). Fares refer to the cost of using public transportation, ADDENDA are additional items or clauses added to a document, EASY is an adjective used to describe something that is not difficult, and addons are extra features or services that can be added to something.