crampoon vs grappling iron

crampoon and grappling iron both are nouns.

Word	Noun	Adjective	Verb	Adverb
crampoon	Yes	No	No	No
grappling iron	Yes	No	No	No

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

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

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

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