11. Bazaar and Bizarre
A bazaar is a market. A bizarre bazaar is a strange market indeed. The former has Persian roots, the latter Spanish.
12. Berth and Birth
These words are pronounced the same but have very different meanings. A berth is where a ship moors or a passenger sleeps. Birth can be used as a noun, adjective, and verb in relation to having offspring.
13. Biannual and Biennial
These words are easily confused. Biannual means twice a year, while biennial means every two years.
14. Bloc and Block
Bloc means a group of nations or people united by a common interest. Block has a number of meanings, including prevent, as in block a bloc from working together.
15. Canvas and Canvass
Canvas is something you paint on or sleep under. To canvass means to solicit votes or support. One “s” makes all the difference.