postulate vs claim

postulate and claim both are nouns.

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

As verbs, claim is a hypernym of postulate; that is, claim is a word with a broader meaning than postulate:

As verbs, claim is a hyponym of postulate; that is, claim is a word with a more specific, narrower meaning than postulate:

Other hyponyms of postulate include exact, take, govern, draw, cost, cry for, cry out for, compel.

postulate (noun)	claim (noun)
(logic) a proposition that is accepted as true in order to provide a basis for logical reasoning	demand for something as rightful or due
	an established or recognized right
	an informal right to something
	an assertion of a right (as to money or property)
	a demand
	an assertion that something is true or factual

postulate (verb)	claim (verb)
take as a given; assume as a postulate or axiom	assert or affirm strongly; state to be true or existing
maintain or assert	take as an undesirable consequence of some event or state of affairs
require as useful, just, or proper	ask for legally or make a legal claim to, as of debts, for example
	lay claim to; as of an idea
	demand as being one's due or property; assert one's right or title to