aboral
Aposematism
Stoma is the medical term for mouth or opening.
stomatitis
Stomatalgia is the medical term meaning mouth pain.
There really is no antonym for the word zoology. There is nothing that has an "opposite" meaning.
Orogastric
Palatitis
Extraoral is the medical term meaning outside the mouth.
The palatine bone
PHARNX
stomatomycosis