cubic content unit vs cubature unit

cubic content unit and cubature unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
cubic content unit	Yes	No	No	No
cubature unit	Yes	No	No	No

As nouns, cubic content unit and cubature unit are synonyms defined as:

cubic content unit and cubature unit: a unit of measurement of volume or capacity

Other synonyms of cubic content unit include capacity measure, capacity unit, cubage unit, cubic measure, displacement unit, volume unit.

cubic content unit (noun)	cubature unit (noun)
a unit of measurement of volume or capacity	a unit of measurement of volume or capacity