microcephalous vs nanocephalic

microcephalous and nanocephalic both are adjectives.

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

As adjectives, microcephalous and nanocephalic are synonyms defined as:

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

Other synonyms of microcephalous include microcephalic.

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