Formal:
* Gloves: This is the most common synonym.
* Glovelets: This refers to short gloves that cover only the hand.
* Mittens: This is a more formal way to say "mitts."
Informal:
* Hand warmers: This refers to any item that keeps your hands warm, including mitts.
* Warmers: This is a shorter version of "hand warmers."
* Paw protectors: This is a playful term, often used for children's mittens.
Specific types of mitts:
* Fingerless gloves: These have openings for the fingers.
* Work gloves: These are designed for specific tasks, such as gardening or construction.
* Driving gloves: These are made of leather and are typically used for driving.
The best synonym for "mitts" will depend on the specific situation.