Here are a few possibilities:
For a physical movement:
* Movement: This is a general term for any motion, including shaking.
* Tremor: This is a specific kind of shaking, often referring to involuntary muscle movements.
* Vibration: This is a rapid back-and-forth movement, often used in a mechanical context.
For a beverage:
* Milk shake: This is the specific name for a blended drink.
* Smoothie: This is another type of blended drink, often made with fruit and vegetables.
* Beverage: This is a general term for any drink.
For an emotional state:
* Fear: A strong feeling of anxiety or apprehension can be described as a "shake."
* Nervousness: This is a feeling of unease or anxiety, which can cause someone to shake.
* Excitement: A strong feeling of anticipation or joy can also make someone shake.
To give you the most accurate abstract noun for "shake," please provide more context about what kind of "shake" you're referring to.