38th vs thirty-eighth

38th and thirty-eighth both are adjectives.

Word	Noun	Adjective	Verb	Adverb
38th	No	Yes	No	No
thirty-eighth	No	Yes	No	No

As adjectives, 38th and thirty-eighth are synonyms defined as:

38th and thirty-eighth: the ordinal number of thirty-eight in counting order

38th (adjective)	thirty-eighth (adjective)
the ordinal number of thirty-eight in counting order	the ordinal number of thirty-eight in counting order