nanocephaly vs microcephaly

nanocephaly and microcephaly both are nouns.

Word	Noun	Adjective	Verb	Adverb
nanocephaly	Yes	No	No	No
microcephaly	Yes	No	No	No

As nouns, nanocephaly and microcephaly are synonyms defined as:

nanocephaly and microcephaly: an abnormally small head and underdeveloped brain

Other synonyms of nanocephaly include microcephalus.

nanocephaly (noun)	microcephaly (noun)
an abnormally small head and underdeveloped brain	an abnormally small head and underdeveloped brain