i·ron·clad 
(īərn-klăd′)
(īərn-klăd′)adj.
1. Sheathed with iron plates for protection.
2. Rigid; fixed: an ironclad rule.
n.
A 19th-century warship having sides armored with metal plates.
- command
- commandable
- commandant
- command economy
- commandeer
- commander
- commander in chief
- commanding
- commandingly
- commandingness
- commanding officer
- command line
- commandment
- command module
- commando
- command post
- comma splice
- commedia dell'arte
- comme il faut
- commemorate
- commemoration
- commemorative
- commemoratively
- commemorator
- commemoratory