one hundred forty-five vs cxlv

one hundred forty-five and cxlv both are adjectives.

Word	Noun	Adjective	Verb	Adverb
one hundred forty-five	No	Yes	No	No
cxlv	No	Yes	No	No

As adjectives, one hundred forty-five and cxlv are synonyms defined as:

Other synonyms of one hundred forty-five include 145.

one hundred forty-five (adjective)	cxlv (adjective)
being five more than one hundred forty	being five more than one hundred forty