Kachaturian is a proper noun, the name of a famous Armenian composer of the 20th century, Aram Khachaturian. Since it's a name, there are no synonyms for Kachaturian. However, one could use synonyms for the words related to Kachaturian. For instance, the word 'composer' could be substituted with other similar words like 'musician,' 'songwriter,' or 'author.' The word 'Armenian' could be replaced with 'Eurasian' or 'Middle Eastern.' And the century '20th century' could be substituted with '1900s,' 'the age of technology,' or 'modern era.' However, when referring to the name Kachaturian, it remains specific to the notable composer.