When you think about a gala opening, words like grand, majestic, and celebratory come to mind. These descriptive words capture the essence of an event where the opening of something is marked with much fanfare. You could also use phrases like star-studded, red-carpet or opening night to convey a similar feeling of glamour and excitement. When describing a more traditional or formal opening, terms like ceremonial, ribbon-cutting, or inaugural might be more appropriate. Ultimately, when choosing synonyms for gala opening, opt for words that evoke a sense of grandeur, celebration, and excitement that come with launching something new.