microcephalic vs nanocephalic

microcephalic and nanocephalic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
microcephalic	No	Yes	No	No
nanocephalic	No	Yes	No	No

As adjectives, microcephalic and nanocephalic are synonyms defined as:

microcephalic and nanocephalic: having an abnormally small head and underdeveloped brain

Other synonyms of microcephalic include microcephalous.

microcephalic (adjective)	nanocephalic (adjective)
having an abnormally small head and underdeveloped brain	having an abnormally small head and underdeveloped brain