cubic content unit vs capacity unit

cubic content unit and capacity unit both are nouns.

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

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

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

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

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