key ring 
noun
A metal ring on to which keys may be threaded in order to keep them together.Guns designed to look like mobile phones or even key rings may be filtering into Britain, it emerged yesterday....
- On his key ring he had three keys and one metal football key-chain with his number, 88 inscribed on the back.
- Kai leaned forward and, with the most practiced patience I had ever seen anyone exhibit, undid each metal-bolted lock with the tiny keys attached the key ring on his belt.
- pre-makeready
- pre-man
- premandibular
- Premarin
- premarital
- premaritally
- premaster
- prematch
- prematerial
- prematuration
- premature
- premature ageing
- prematured
- premature ejaculation
- prematurely
- prematureness
- premature pubarche
- prematurity
- premaxilla
- premaxillary
- premaxillo-maxillary
- pre-med
- premedial
- premedian
- premedical