modulus of elasticity vs elastic modulus

modulus of elasticity and elastic modulus both are nouns.

Word	Noun	Adjective	Verb	Adverb
modulus of elasticity	Yes	No	No	No
elastic modulus	Yes	No	No	No

As nouns, modulus of elasticity and elastic modulus are synonyms defined as:

modulus of elasticity and elastic modulus: (physics) the ratio of the applied stress to the change in shape of an elastic body

Other synonyms of modulus of elasticity include coefficient of elasticity.

modulus of elasticity (noun)	elastic modulus (noun)
(physics) the ratio of the applied stress to the change in shape of an elastic body	(physics) the ratio of the applied stress to the change in shape of an elastic body