glenoid cavity vs glenoid fossa

glenoid cavity and glenoid fossa both are nouns.

Word	Noun	Adjective	Verb	Adverb
glenoid cavity	Yes	No	No	No
glenoid fossa	Yes	No	No	No

As nouns, glenoid cavity and glenoid fossa are synonyms defined as:

glenoid cavity and glenoid fossa: the concavity in the head of the scapula that receives the head of the humerus to form the shoulder joint

glenoid cavity (noun)	glenoid fossa (noun)
the concavity in the head of the scapula that receives the head of the humerus to form the shoulder joint	the concavity in the head of the scapula that receives the head of the humerus to form the shoulder joint
	a deep concavity in the temporal bone at the root of the zygomatic arch that receives the condyle of the mandible