acephalism vs acephalia

acephalism and acephalia both are nouns.

Word	Noun	Adjective	Verb	Adverb
acephalism	Yes	No	No	No
acephalia	Yes	No	No	No

As nouns, acephalism and acephalia are synonyms defined as:

acephalism and acephalia: absence of the head (as in the development of some monsters)

Other synonyms of acephalism include acephaly.

acephalism (noun)	acephalia (noun)
absence of the head (as in the development of some monsters)	absence of the head (as in the development of some monsters)