oral cavity(n = noun.body) mouth, oral fissure, rima oris - the opening through which food is taken in and vocalizations emerge; "he stuffed his mouth with candy"
is a kind of rima
is a part of mouth
has parts: dentition, teeth, clapper, glossa, lingua, tongue, buccal cavity, gingiva, gum, palate, roof of the mouth, salivary gland
has particulars: cakehole, gob, hole, maw, trap, yap

abdominal cavity, amniotic cavity, axillary cavity, bodily cavity, buccal cavity, cavity, cavity resonator, cavity wall, chest cavity, cleavage cavity, cotyloid cavity, cranial cavity, glenoid cavity, intracranial cavity, lesser peritoneal cavity, nasal cavity, oral, oral cancer, oral communication, oral contraception, oral contraceptive, oral contraceptive pill, oral contract, oral exam, oral examination, oral fissure, oral herpes, oral personality, oral phase, oral poliovirus vaccine, oral presentation, oral roberts, oral sex, oral smear, oral stage, oral surgery, orbital cavity, pelvic cavity, pericardial cavity, peritoneal cavity, pleural cavity, pulp cavity, segmentation cavity, thoracic cavity, trivalent live oral poliomyelitis vaccine, tubular cavity, tympanic cavity, uterine cavity