The term 'Voice with an Echo' can be solved by the crossword solution 'Alexa', which is a five-letter word. Alexa is a virtual assistant developed by Amazon, and is primarily used in Amazon Echo devices. Alexa is capable of voice interaction, music playback, making to-do lists, setting alarms, streaming podcasts, playing audiobooks, and providing weather, traffic, and other real-time information. Alexa also has the ability to control several smart devices using itself as a home automation system.