The term 'HUGE GULF' can be solved by the crossword solution 'ABYSS', which is a five-letter word. An ABYSS is a deep, immeasurable space or cavity, often filled with water. It is commonly used to describe the depths of the ocean, and can also be used to refer to a large chasm or void between two objects. The term 'HUGE GULF' implies a large, seemingly bottomless space, making 'ABYSS' an appropriate solution.