The crossword solutions for the term 'NOT FANCY IN THE LEAST' are DETEST and HATE. Both words mean to feel intense dislike or aversion for something, but they differ in intensity. DETEST is a stronger word than HATE, as it implies a deep-seated loathing or revulsion. HATE, on the other hand, is a more general term that can be used to describe a range of negative feelings. Both words can be used to express strong disapproval or distaste for something.