The term 'most luxurious' can be described by a variety of words, each with seven or eight letters. The word 'poshest' is used to describe something that is of the highest quality and elegance. 'Lushest' is used to describe something that is very lush and abundant in nature. 'Ritziest' is used to describe something that is very grand and opulent. 'Plushiest' is used to describe something that is very soft and comfortable. Lastly, 'richest' is used to describe something that is of the highest quality and has the most wealth. All of these words are used to describe something that is of the highest quality and extravagance.