The inertia of a bowling ball is the inertia of a golf ball. less than
equal to
greater than

The inertia of a bowling ball is greater than the inertia of a golf ball.

In Newton's first law, it is stated that if the resultant force acts on an object of magnitude is zero, it can be formulated:  

then the object tends to defend itself from its state.  

or can be stated:  

An object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force.  

So for objects in a state of movement, objects tend to move forever. Likewise, for objects in a state of rest, they tend to remain forever. The tendency of objects like this is called inertia  

The size of inertia is proportional to mass, the greater the mass of the object, the greater the inertia of the object.  

Objects that have more mass will have more ability to maintain their state

So a larger bowling ball mass will have greater inertia than a golf ball

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