paleoencephalon vs palaeencephalon

paleoencephalon and palaeencephalon both are nouns.

Word	Noun	Adjective	Verb	Adverb
paleoencephalon	Yes	No	No	No
palaeencephalon	Yes	No	No	No

As nouns, paleoencephalon and palaeencephalon are synonyms defined as:

paleoencephalon and palaeencephalon: the more primitive parts of the brain phylogenetically; most structures other than the cerebral cortex

Other synonyms of paleoencephalon include paleencephalon.

paleoencephalon (noun)	palaeencephalon (noun)
the more primitive parts of the brain phylogenetically; most structures other than the cerebral cortex	the more primitive parts of the brain phylogenetically; most structures other than the cerebral cortex