Quartiles are often used in statistical analysis to divide a set of data into four equal parts. There are several synonyms for the word "quartiles," including "quartile range," "interquartile range," and "quartile deviation." These terms refer to the distance between the first and third quartiles, which can be used to measure the spread of the data. Other related terms include "percentiles," which divide data into 100 equal parts, and "deciles," which divide data into 10 equal parts. Understanding these statistical terms can help researchers and analysts better understand and interpret data sets, and make more informed decisions based on their findings.