47th vs forty-seventh

47th and forty-seventh both are adjectives.

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

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

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

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