[例]  The company has some big backers.

[同义词]  patron, sponsor, benefactor

backing (n.) support, usually financial one资助

[例]  Strong governmental baking makes the project very profitable.

backhander  (n. inf.) a bribe, money given under the table贿赂

[例]  The chief director was arrested for his involvement in some backhander affairs.

[同义词]  bribe

backlog  (n.) build-up of work or orders which have not been processed积压的工作（或订单）

[例]  The failure of the project was due to backlog of superior orders.

back up support 支持

[例]  You should back up all claims you make.