forty-seventh vs 47th

forty-seventh and 47th both are adjectives.

Word	Noun	Adjective	Verb	Adverb
forty-seventh	No	Yes	No	No
47th	No	Yes	No	No

As adjectives, forty-seventh and 47th are synonyms defined as:

forty-seventh and 47th: the ordinal number of forty-seven in counting order

forty-seventh (adjective)	47th (adjective)
the ordinal number of forty-seven in counting order	the ordinal number of forty-seven in counting order