postulate vs compel

postulate is a noun but compel is not a noun.

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

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

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

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

postulate (verb)	compel (verb)
take as a given; assume as a postulate or axiom	force somebody to do something
maintain or assert	necessitate or exact
require as useful, just, or proper