axillary cavity vs armpit

axillary cavity and armpit both are nouns.

Word	Noun	Adjective	Verb	Adverb
axillary cavity	Yes	No	No	No
armpit	Yes	No	No	No

As nouns, axillary cavity and armpit are synonyms defined as:

axillary cavity and armpit: the hollow under the arm where it is joined to the shoulder

Other synonyms of axillary cavity include axilla, axillary fossa.

axillary cavity (noun)	armpit (noun)
the hollow under the arm where it is joined to the shoulder	the hollow under the arm where it is joined to the shoulder