Similar words: backbite, backbiting, backbitten, blackbird, backbone, kick back, kickback, backbeat.
1. He is the person who backbites.
2. A lot of backbiting goes on in our office.
3. All this backbiting is destroying company morale.
4. He was tired of all the backbiting and gossip in the office.
5. A feral world of backbiting malice, veiled threats, liars and blackmailers.
6. I do not enjoy pulling rank, but I do not tolerate unmanly gossip and back-biting.
7. He who blames one to his face is a hero, but he who backbites is a coward. 
8. His classmate do not enjoy his company because he always backbite others.
9. What they have done, however, is turn the sleepy municipal bond industry into a caldron of backbiting and finger-pointing.
More similar words: backbite, backbiting, backbitten, blackbird, backbone, kick back, kickback, backbeat, backboard, backbench, knock back, back burner, backbencher, to the backbone, stock buyback, backbreaking, network backbone, put the clock back, back to back, back-to-back, backpacking, backpacker, backtracking, backtrack, back pack, backpack, jackboot, blackball, black box, snack bar.