bulk modulus vs elastic modulus

bulk modulus and elastic modulus both are nouns.

Word	Noun	Adjective	Verb	Adverb
bulk modulus	Yes	No	No	No
elastic modulus	Yes	No	No	No

As nouns, elastic modulus is a hypernym of bulk modulus; that is, elastic modulus is a word with a broader meaning than bulk modulus:

bulk modulus: the ratio of the change in pressure acting on a volume to the fractional change in volume
elastic modulus: (physics) the ratio of the applied stress to the change in shape of an elastic body

Other hypernyms of bulk modulus include coefficient of elasticity, modulus of elasticity.

bulk modulus (noun)	elastic modulus (noun)
the ratio of the change in pressure acting on a volume to the fractional change in volume	(physics) the ratio of the applied stress to the change in shape of an elastic body