The term "sell on" can be used in a variety of contexts, from business to sports. When talking about business, other synonyms for "sell on" could include "promote", "market", "advertise" or "pitch". Each of these words suggests pushing a product or idea to potential customers or clients. In the sports world, "sell on" can refer to passing a ball or puck to a teammate in a way that they can then take possession and move forward. Synonyms for this usage could include "pass on", "feed", "distribute" or "give". Regardless of the context, the meaning behind "sell on" is generally one of transferring or transmitting something to another person or group.