The best replacement for moment of inertia is section modulus.

The best alternatives to moment of inertia are rated as following:

★★★★★	section modulus
★★★★	inertia
★★★★	mass moment of inertia
★★★	polar moment of inertia
★★★	torque
★★	moment of inertia
★★	second moment of inertia
★★	center of mass
★	low moment of inertia
★	product of inertia
★	second moment of area
	area moment of inertia

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Speaking about moment of inertia, one probably shouldn't forget about angular acceleration.

Other search terms related to moment of inertia and their ratings are:

★★★★★	angular acceleration
★★★	angular velocity
★★★	torque
★	pulley
	disk

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moment of inertia

section modulus

inertia