The fashionable world is a phrase that signifies the latest trends, styles, and fashions. Several synonyms can replace the term to make it more expressive and appealing. These words may include 'chic world' that reflects a high level of elegance and sophistication. 'Sartorial world' is another excellent substitute and signals the world of style and fashion. Another synonym is the 'vogue world' that points to the prevailing fashion trends. We can also use the 'modish world' that connotes a modern and trendy way of dressing. Other synonyms include 'stylish world,' 'fancy world,' 'hip world,' and 'classy world,' among others. These phrases capture the essence of the fashionable world and are useful in describing the modern world of fashion.