The term 'Nevadas' can be solved by the crossword solution 'SIERRA, ' which is a six-letter word. SIERRA is a mountain range in western North America, located in the states of California, Nevada, and Utah. The SIERRA Nevada mountain range is one of the most prominent mountain ranges in the United States, and it is home to some of the highest peaks in the country. The range is also known for its beautiful scenery and abundant wildlife.