anencephalia vs anencephaly

anencephalia and anencephaly both are nouns.

Word	Noun	Adjective	Verb	Adverb
anencephalia	Yes	No	No	No
anencephaly	Yes	No	No	No

As nouns, anencephalia and anencephaly are synonyms defined as:

anencephalia and anencephaly: a defect in brain development resulting in small or missing brain hemispheres

anencephalia (noun)	anencephaly (noun)
a defect in brain development resulting in small or missing brain hemispheres	a defect in brain development resulting in small or missing brain hemispheres