idioglossia /id-i-ō-glosˈi-ə/

1. A condition in which pronunciation is so bad as to be quite unintelligible
2. A private language developed between two or more children, esp twins, etc

• fowls of warren
• fowth
• fowths
• fox
• fox and geese
• fox-bat
• fox-bats
• foxberries
• foxberry
• fox-brush
• fox-brushes
• fox-earth
• fox-earths
• foxed
• foxes
• fox-evil
• fox-evils
• foxfire
• foxfires
• foxglove
• foxgloves
• fox-grape
• fox-grapes
• foxhole
• foxholes