The term 'disturb the composure of' can be expressed in four different ways using crossword solutions. The first is 'UNNERVE, ' which has seven letters and means to make someone feel uneasy or anxious. The second is 'FAZE, ' which has four letters and means to disconcert or confuse someone. The third is 'POISE, ' which has five letters and means to remain calm and composed in a difficult situation. Finally, the fourth solution is 'APLOMB, ' which has six letters and means to have self-confidence and assurance. All four of these words describe the same concept of being disturbed or unsettled.