XXIX vs twenty-nine

XXIX and twenty-nine both are nouns.

Word	Noun	Adjective	Verb	Adverb
XXIX	Yes	No	No	No
twenty-nine	Yes	Yes	No	No

As nouns, XXIX and twenty-nine are synonyms defined as:

XXIX and twenty-nine: the cardinal number that is the sum of twenty-eight and one

Other synonyms of XXIX include 29.

XXIX (noun)	twenty-nine (noun)
the cardinal number that is the sum of twenty-eight and one	the cardinal number that is the sum of twenty-eight and one

XXIX (adjective)	twenty-nine (adjective)
	being nine more than twenty