The term XM is used to refer to a satellite RADIO service. It was founded in 2001 and provides commercial-free music, news, sports, talk, and other entertainment programming. The five-letter solution for XM is RADIO, which refers to the technology used to transmit the signal from the satellite to the receiver. The six-letter solution for XM is RADIOS, which refers to the receivers that are used to listen to the satellite RADIO service.