proconsular vs proconsul

proconsular is not a noun while proconsul is a noun.

Word	Noun	Adjective	Verb	Adverb
proconsular	No	Yes	No	No
proconsul	Yes	No	No	No

proconsular (noun)	proconsul (noun)
	an anthropoid ape of the genus Proconsul
	a provincial governor of consular rank in the Roman Republic and Roman Empire
	an official in a modern colony who has considerable administrative power

proconsular (adjective)	proconsul (adjective)
of or relating to or typical of a proconsul