shoulder vs axillary fossa

shoulder and axillary fossa both are nouns.

Word	Noun	Adjective	Verb	Adverb
shoulder	Yes	No	Yes	No
axillary fossa	Yes	No	No	No

shoulder (noun)	axillary fossa (noun)
a narrow edge of land (usually unpaved) along the side of a road	the hollow under the arm where it is joined to the shoulder
the part of a garment that covers or fits over the shoulder
the part of the body between the neck and the upper arm
a ball-and-socket joint between the head of the humerus and a cavity of the scapula
a cut of meat including the upper joint of the foreleg

shoulder (verb)	axillary fossa (verb)
push with the shoulders
carry a burden, either real or metaphoric
lift onto one's shoulders