British capacity unit vs Imperial capacity unit

British capacity unit and Imperial capacity unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
British capacity unit	Yes	No	No	No
Imperial capacity unit	Yes	No	No	No

As nouns, British capacity unit and Imperial capacity unit are synonyms defined as:

British capacity unit and Imperial capacity unit: a unit of measure for capacity officially adopted in the British Imperial System; British units are both dry and wet

British capacity unit (noun)	Imperial capacity unit (noun)
a unit of measure for capacity officially adopted in the British Imperial System; British units are both dry and wet	a unit of measure for capacity officially adopted in the British Imperial System; British units are both dry and wet