capitulum vs ear

capitulum and ear both are nouns.

Word	Noun	Adjective	Verb	Adverb
capitulum	Yes	No	No	No
ear	Yes	No	No	No

As nouns, capitulum and ear are synonyms defined as:

Other synonyms of capitulum include spike.

capitulum (noun)	ear (noun)
a dense cluster of flowers or foliage	the sense organ for hearing and equilibrium
fruiting spike of a cereal plant especially corn	the externally visible cartilaginous structure of the external ear
an arrangement of leafy branches forming the top or head of a tree	good hearing
	attention to what is said
	fruiting spike of a cereal plant especially corn