megalocephaly vs macrocephaly

megalocephaly and macrocephaly both are nouns.

Word	Noun	Adjective	Verb	Adverb
megalocephaly	Yes	No	No	No
macrocephaly	Yes	No	No	No

As nouns, megalocephaly and macrocephaly are synonyms defined as:

megalocephaly and macrocephaly: an abnormally large head; differs from hydrocephalus because there is no increased intracranial pressure and the overgrowth is symmetrical

Other synonyms of megalocephaly include megacephaly.

megalocephaly (noun)	macrocephaly (noun)
an abnormally large head; differs from hydrocephalus because there is no increased intracranial pressure and the overgrowth is symmetrical	an abnormally large head; differs from hydrocephalus because there is no increased intracranial pressure and the overgrowth is symmetrical