twenty-two vs XXII

twenty-two and XXII both are nouns.

Word	Noun	Adjective	Verb	Adverb
twenty-two	Yes	Yes	No	No
XXII	Yes	No	No	No

As nouns, twenty-two and XXII are synonyms defined as:

twenty-two and XXII: the cardinal number that is the sum of twenty-one and one

Other synonyms of twenty-two include 22.

twenty-two (noun)	XXII (noun)
a .22 caliber firearm (pistol or rifle)	the cardinal number that is the sum of twenty-one and one
the cardinal number that is the sum of twenty-one and one

twenty-two (adjective)	XXII (adjective)
being two more than twenty