The term 'Canyon Mouth' refers to the opening of a canyon, which is typically formed by erosion over time. The crossword solutions for this term are ABRA (4 letters), STEVE (5 letters), and ECHO (4 letters). Abra is a Hebrew word meaning 'to cross over, ' which is fitting for the mouth of a canyon. Steve is a common English name, which could be used to refer to a person who has explored the canyon. ECHO is a sound that can reverberate off the walls of a canyon.