"oral" = "aural" ?

I pronounce them indistinguishably. On the other hand my parents, veterans of young adulthood in New York City during the Depression when civil service jobs were a thing to be prized, used to tell about how the Board of Education used the candidates' pronounciation of those two words as a disqualifying criterion. (So many applicants, so few openings...) I think they had to be different, but I couldn't say which was what.