postulate vs postulation

postulate and postulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
postulate	Yes	No	Yes	No
postulation	Yes	No	No	No

postulate (noun)	postulation (noun)
(logic) a proposition that is accepted as true in order to provide a basis for logical reasoning	(logic) a declaration of something self-evident; something that can be assumed as the basis for argument
	a formal message requesting something that is submitted to an authority

postulate (verb)	postulation (verb)
take as a given; assume as a postulate or axiom
maintain or assert
require as useful, just, or proper