moment of inertia vs inertia

moment of inertia and inertia both are nouns.

Word	Noun	Adjective	Verb	Adverb
moment of inertia	Yes	No	No	No
inertia	Yes	No	No	No

As nouns, inertia is a hypernym of moment of inertia; that is, inertia is a word with a broader meaning than moment of inertia:

moment of inertia: the tendency of a body to resist angular acceleration
inertia: (physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force

Other hypernyms of moment of inertia include moment.

moment of inertia (noun)	inertia (noun)
the tendency of a body to resist angular acceleration	a disposition to remain inactive or inert
	(physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force