assert vs posit

assert is not a noun while posit is a noun.

Word	Noun	Adjective	Verb	Adverb
assert	No	No	Yes	No
posit	Yes	No	Yes	No

As verbs, posit is a hypernym of assert; that is, posit is a word with a broader meaning than assert:

Other hypernyms of assert include postulate.

assert (noun)	posit (noun)
	(logic) a proposition that is accepted as true in order to provide a basis for logical reasoning

assert (verb)	posit (verb)
postulate positively and assertively	take as a given; assume as a postulate or axiom
to declare or affirm solemnly and formally as true	put before
state categorically	put (something somewhere) firmly
insist on having one's opinions and rights recognized