- Backflush Noun Verb
- Backfriend Noun
- Backfurrow Noun Verb
- Backgammon Noun
- Background Noun Adj
- Backgrounder Noun
- Backgrounding Noun
- Backhand Noun Adj Verb
- Backhanded Adj
- Backhander Noun
- Backhanding Noun
- Backhaul Noun Verb
- Backheating Noun
- Backheel Noun Verb
- Backhoe Noun
- Backhouse Noun
- Backing Noun
- Backlapping Noun
- Backlash Noun Verb
- Backlatcher Noun
- Backless Adj
- Backlight Noun Verb
- Backlighting Noun
- Backliner Noun
- Backlining Noun
- Backlist Noun Verb
- Backlog Noun Verb
- Backlogged Adj
- Backlogging Noun
- Backman Noun
- Backmost Adj
- Backorder Noun Verb
- Backout Noun Verb
- Backpack Noun Verb
- Backpacker Noun
- Backpacking Noun
- Backpage Noun
- Backpay Noun
- Backpedal Verb
- Backplane Noun
- Backplate Noun
- Backporting Noun
- Backpressure Noun
- Backpropagation Noun
- Backreaming Noun
- Backreef Noun Adj
- Backrest Noun
- Backrolling Noun
- Backroom Adj Noun
- Backsaw Noun
- Backscatter Noun Verb
- Backscattered Adj
- Backscattering Noun
- Backscratcher Noun
- Backseat Noun
- Backset Noun
- Backsheesh Noun
- Backshell Noun
- Backshift Noun Verb
- Backside Noun