Gairish, an adjective commonly used to describe something excessively flashy or showy, can be replaced with a variety of synonyms depending on the context. Flamboyant, ostentatious, garish, and gaudy are all popular options to convey a similar meaning. Alternatively, if a more subdued description is desired, one could use the words ostentatious or loud. In fashion, the word audacious can also be used to describe something that is bold or daring in style. When describing decor, the words over-the-top and kitschy may also be appropriate. Overall, there are many synonyms that can effectively convey the same connotation as the word gairish in various contexts.