tympanum vs tympanic membrane

tympanum and tympanic membrane both are nouns.

Word	Noun	Adjective	Verb	Adverb
tympanum	Yes	No	No	No
tympanic membrane	Yes	No	No	No

As nouns, tympanum and tympanic membrane are synonyms defined as:

tympanum and tympanic membrane: the membrane in the ear that vibrates to sound

Other synonyms of tympanum include eardrum, myringa.

tympanum (noun)	tympanic membrane (noun)
a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it	the membrane in the ear that vibrates to sound
the membrane in the ear that vibrates to sound
the main cavity of the ear; between the eardrum and the inner ear