catapult vs propel

catapult is a noun but propel is not a noun.

Word	Noun	Adjective	Verb	Adverb
catapult	Yes	No	Yes	No
propel	No	No	Yes	No

As verbs, propel is a hypernym of catapult; that is, propel is a word with a broader meaning than catapult:

Other hypernyms of catapult include impel.

catapult (noun)	propel (noun)
an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles
a plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones
a device that launches aircraft from a warship

catapult (verb)	propel (verb)
shoot forth or launch, as if from a catapult	cause to move forward with force
hurl as if with a sling	give an incentive for action