prehend vs grapple

prehend is not a noun while grapple is a noun.

Word	Noun	Adjective	Verb	Adverb
prehend	No	No	Yes	No
grapple	Yes	No	Yes	No

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

prehend (noun)	grapple (noun)
	the act of engaging in close hand-to-hand combat
	a tool consisting of several hooks for grasping and holding; often thrown with a rope
	a dredging bucket with hinges like the shell of a clam

prehend (verb)	grapple (verb)
take into your hands deliberately	to grip or seize, as in a wrestling match
	succeed in doing, achieving, or producing (something) with the limited or inadequate means available