macrocephalous vs macrocephalic

macrocephalous and macrocephalic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
macrocephalous	No	Yes	No	No
macrocephalic	No	Yes	No	No

As adjectives, macrocephalous and macrocephalic are synonyms defined as:

macrocephalous and macrocephalic: having an exceptionally large head and brain

macrocephalous (adjective)	macrocephalic (adjective)
having an exceptionally large head and brain	having an exceptionally large head and brain