orad vs oral

orad is not a noun while oral is a noun.

Word	Noun	Adjective	Verb	Adverb
orad	No	No	No	Yes
oral	Yes	Yes	No	No

orad (noun)	oral (noun)
	an examination conducted by spoken communication

orad (adjective)	oral (adjective)
	of or involving the mouth or mouth region or the surface on which the mouth is located
	a stage in psychosexual development when the child's interest is concentrated in the mouth; fixation at this stage is said to result in dependence, selfishness, and aggression
	of or relating to or affecting or for use in the mouth
	using speech rather than writing

orad (adverb)	oral (adverb)
toward the mouth or oral region