lock·nut also lock nut 
(lŏknŭt′)
(lŏknŭt′)n.
1. A usually thin nut screwed down on another nut to prevent it from loosening.
2. A self-locking nut.
- breechclout
- breech delivery
- breeches buoy
- breeching
- breechloader
- breechloading
- breech presentation
- breed
- breed a scab on nose
- breed a scab on one's nose
- breed a scab/scabs on (one's) nose
- breed a scabs on nose
- breed a scabs on one's nose
- breeder
- breeder reactor
- breeding
- breeding ground
- Breed's Hill
- breed up a storm
- breeks
- breeze
- breeze
- breezeway
- breezily
- breeziness