crampon vs grappling iron

crampon and grappling iron both are nouns.

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

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

crampon: 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 crampon include grapnel, grapple, grappler, grappling hook.

crampon (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