While clearly pronounced differently, bizarre and bazaar are similar enough to cause confusion. Although it may simply be the spelling of each that confuses, rather than mixing the two up…

Bazaar [noun]: a marketplace with miscellaneous stalls and shops, especially in a Middle Eastern country; a shop or market selling a mixture of items; a stall or market where goods are sold as a fund-raising event
Mireille strolled through the bazaar while waiting for friends in Lebanon. 

Bizarre [adjective]: odd, obviously out of the ordinary and different, far-fetched, unexpected
The teacher’s outfit was bizarre – a mix of cultures, colours and fabrics like I’d never seen before.