salamander vs fire iron

salamander and fire iron both are nouns.

Word	Noun	Adjective	Verb	Adverb
salamander	Yes	No	No	No
fire iron	Yes	No	No	No

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

salamander: fire iron consisting of a metal rod with a handle; used to stir a fire
fire iron: metal fireside implements

salamander (noun)	fire iron (noun)
any of various typically terrestrial amphibians that resemble lizards and that return to water only to breed	metal fireside implements
fire iron consisting of a metal rod with a handle; used to stir a fire
reptilian creature supposed to live in fire