• skagerrak,
• akagerak,
• zkagerak,
• xkagerak,
• dkagerak,
• ekagerak,
• wkagerak,
• sjagerak,
• smagerak,
• slagerak,
• skage5ak,
• skgerak,
• skaggerak,
• Scagerak,
• Skagarak,
• Skage2ak,
• Skageruck,
• Skagarek,
• Skagereck,
• Skagerack

• skiagraph,
• skiagram,
• skiagraphy,
• Skagerrak.

The adjective form of the word "Skagerak" is "Skagerakian".

The plural form of the word "Skagerak" is "Skageraks".

The singular form of the word "Skagerak" is "Skagerak". It is the name of a strait in Northern Europe, and it does not change form when referring to a single instance of it.