The term HAM'S NEED can be solved by the five-letter word RADIO. RADIO is a form of communication that uses electromagnetic waves to transmit signals, allowing people to communicate over long distances. It is used in many different ways, from broadcasting music and news to providing emergency services. Amateur RADIO, or 'ham RADIO, ' is a hobby that involves using RADIO equipment to communicate with other amateur RADIO operators around the world. Ham RADIO operators need radios in order to communicate, making radios an essential part of the hobby.