Spoken, verbal (4)
I believe the answer is:
oral
I believe this is a double definition.
'spoken' is the first definition.
(similar in meaning)
'verbal' is the second definition.
(I've seen this before)
(Other definitions for oral that I've seen before include "Viva voce" , "Spoken rather than written" , "Unwritten examination" , "Via the mouth" , "Like some tradition" .)