lock·set 
(lŏksĕt′)
(lŏksĕt′)n.
A set of hardware for shutting or locking a door.
- ophthalmitis
- ophthalmo-
- ophthalmologic
- ophthalmological
- ophthalmologically
- ophthalmologist
- ophthalmology
- ophthalmoscope
- ophthalmoscopic
- ophthalmoscopical
- ophthalmoscopy
- -opia
- opiate
- opine
- opinion
- opinionate
- opinionated
- opinionatedly
- opinionative
- opinionatively
- opioid
- opisthobranch
- opisthognathism
- opisthognathous
- opium