Three ships of the Royal Navy have borne the name HMS Scimitar, after the scimitar, a curved sword:
HMS Scimitar was an S-class destroyer launched in 1918 and sold in 1947.
HMS Scimitar was a patrol vessel launched in 1969 and sold in 1983.
HMS Scimitar is a Scimitar-class patrol vessel, formerly the MV Grey Fox. She entered service in 1993, was transferred to the Royal Navy in 2002 and renamed Scimitar, and is currently in service.