AMFM is an acronym that stands for "Amplitude Modulation" and "Frequency Modulation," which are two of the main transmission technologies used for broadcasting radio signals. However, there are many different synonyms that can be used to describe these types of radio signals and broadcasting technologies. Some of the most common synonyms include "terrestrial radio," "broadcast radio," "analog radio," "FM/AM radio," and "over-the-air radio." Additionally, there are many different types of radio broadcasting technologies and formats, including HD radio, satellite radio, internet radio, and others, that offer different levels of quality, convenience, and accessibility for listeners. Overall, it's important to know the different synonyms and broadcasting technologies in order to fully understand and enjoy the world of radio broadcasting.