crampoon vs climbing iron

crampoon and climbing iron both are nouns.

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

As nouns, crampoon and climbing iron are synonyms defined as:

crampoon and climbing iron: an iron spike attached to the shoe to prevent slipping on ice when walking or climbing

Other synonyms of crampoon include climber, crampon.

crampoon (noun)	climbing iron (noun)
an iron spike attached to the shoe to prevent slipping on ice when walking or climbing	an iron spike attached to the shoe to prevent slipping on ice when walking or climbing
a hinged pair of curved iron bars; used to raise heavy objects	a spiked steel frame strapped to the boot to help in climbing trees, or poles.