I understand that the word "fashion show" is the most common phrase to express "demonstrating fashion"; however, are there any alternative words to replace it?
Native speaker’s answer
Rebecca
The term meaning a demonstration of a collection of (new) clothing designs is "fashion show," and this is the most commonly used term. You can also use "fashion event," however this term is much more general and does not provide as clear a description as "fashion show" does. Ex: I am excited for this designer's spring/summer fashion show. Ex: I once participated as a volunteer model for my school's fashion show.