thirty-three vs 33

thirty-three and 33 both are adjectives.

Word	Noun	Adjective	Verb	Adverb
thirty-three	No	Yes	No	No
33	No	Yes	No	No

As adjectives, thirty-three and 33 are synonyms defined as:

Other synonyms of thirty-three include xxxiii.

thirty-three (adjective)	33 (adjective)
being three more than thirty	being three more than thirty