Bond is cash or property given as security for a suspect's appearance in court or his or her performance. Bimonthly - every two months. Semimonthly - twice a month.
Bills are proposed legislation.
A bloc is a coalition or group. Block means to obstruct, a large solid piece of work, stone or metal, or a pulley system. An event or someone can be centered at, centered in or centered on, but not centered around. Chaff means to ridicule good-naturedly, and it also means husks or rubbish. Site is a location.