labyrinth vs internal ear

labyrinth and internal ear both are nouns.

Word	Noun	Adjective	Verb	Adverb
labyrinth	Yes	No	No	No
internal ear	Yes	No	No	No

As nouns, labyrinth and internal ear are synonyms defined as:

labyrinth and internal ear: a complex system of interconnecting cavities; concerned with hearing and equilibrium

Other synonyms of labyrinth include inner ear.

labyrinth (noun)	internal ear (noun)
complex system of paths or tunnels in which it is easy to get lost	a complex system of interconnecting cavities; concerned with hearing and equilibrium
a complex system of interconnecting cavities; concerned with hearing and equilibrium