crampoon vs grapnel

crampoon and grapnel both are nouns.

Word	Noun	Adjective	Verb	Adverb
crampoon	Yes	No	No	No
grapnel	Yes	No	No	No

As nouns, grapnel is a hypernym of crampoon; that is, grapnel is a word with a broader meaning than crampoon:

crampoon: a hinged pair of curved iron bars; used to raise heavy objects
grapnel: a tool consisting of several hooks for grasping and holding; often thrown with a rope

Other hypernyms of crampoon include grapple, grappler, grappling hook, grappling iron.

crampoon (noun)	grapnel (noun)
an iron spike attached to the shoe to prevent slipping on ice when walking or climbing	a light anchor for small boats
a hinged pair of curved iron bars; used to raise heavy objects	a tool consisting of several hooks for grasping and holding; often thrown with a rope