- Backdoor Noun Adj Verb
- Backdraft Noun Adj Pnoun
- Backdrop Noun Verb Adj
- Backed Adj Past Participle
- Backend Noun Adj
- Backer Noun Pnoun Adj
- Backfield Noun Adj
- Backfile Noun Verb Adj
- Backfill Noun Verb Adj
- Backfilled Adj
- Backfiller Noun Adj
- Backfin Noun Adj
- Backfire Noun Verb Adj
- Backfisch Noun Adj
- Backflashover Noun Adj
- Backflip Noun Verb Adj
- Backflow Noun Adj Verb
- Backflush Noun Verb Adj
- Backgammon Noun Adj
- Background Noun Adj Verb
- Backhand Noun Adj Verb Past Participle
- Backhanded Adj Past Participle
- Backhaul Noun Verb Adj
- Backheating Noun Adj
- Backheel Noun Verb Adj
- Backhoe Noun Adj Verb
- Backing Noun Adj Pres. Participle
- Backlapping Noun Adj
- Backlash Noun Verb Adj
- Backlatcher Noun Adj
- Backless Adj
- Backlight Noun Verb Adj
- Backlist Noun Verb Adj
- Backlog Noun Verb Adj
- Backlogged Adj
- Backmarker Noun Adj
- Backmost Adj
- Backpack Noun Verb Adj
- Backpacker Noun Adj
- Backpacking Noun Adj
- Backpage Noun Adj Pnoun
- Backpay Noun Verb Adj
- Backplane Noun Adj
- Backplate Noun Adj
- Backpressure Noun Adj
- Backpropagation Noun Adj
- Backreef Noun Adj
- Backrest Noun Adj
- Backroom Adj Noun
- Backsaw Noun Adj
- Backscatter Noun Verb Adj
- Backscattering Noun Adj
- Backscratcher Noun Adj
- Backseat Noun Adj Verb
- Backset Noun Adj Verb
- Backsheesh Noun Verb Adj
- Backshell Noun Adj
- Backshift Noun Verb Adj
- Backside Noun Adj
- Backside-lateral Adj