Based on meaning:
* Organized: If you're thinking of a bazaar as a chaotic, jumbled marketplace, "organized" could be an antonym.
* Exclusive: If you're contrasting the inclusiveness of a bazaar with a more exclusive retail experience, "exclusive" could be an antonym.
* High-end: If you're comparing a bazaar to a place with high-quality goods, "high-end" could be an antonym.
Based on specific context:
* Department store: If you're thinking of a bazaar as a less structured shopping experience, "department store" could be an antonym.
* Boutique: If you're thinking of a bazaar as a more casual shopping experience, "boutique" could be an antonym.
Other possibilities:
* Supermarket: While not exactly an antonym, "supermarket" suggests a more organized and standardized retail environment.
* Online marketplace: This is a more contemporary option, contrasting a physical bazaar with a digital shopping experience.
Ultimately, the best antonym for "bazaar" depends on the specific situation and the meaning you want to convey.