The term 'most beautiful' can be summarized by two crossword solutions: 'fairest' (7 letters) and 'prettiest' (9 letters). Both words are used to describe something that is pleasing to the eye, and they are often used interchangeably. Fairest is an adjective that means having a pleasing appearance, while prettiest is an adverb that describes something as being very attractive. Both words are used to describe something that is aesthetically pleasing.