iron vs electric iron

iron and electric iron both are nouns.

Word	Noun	Adjective	Verb	Adverb
iron	Yes	Yes	Yes	No
electric iron	Yes	No	No	No

As nouns, electric iron is a hyponym of iron; that is, electric iron is a word with a more specific, narrower meaning than iron:

iron: home appliance consisting of a flat metal base that is heated and used to smooth cloth
electric iron: an iron which uses resistive heating from an electric current.

Other hyponyms of iron include flatiron, gauffer, gauffering iron, goffer, goffering iron, steam iron, travel iron.

iron (noun)	electric iron (noun)
home appliance consisting of a flat metal base that is heated and used to smooth cloth	an iron which uses resistive heating from an electric current.
a golf club that has a relatively narrow metal head
implement used to brand live stock
a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood

iron (adjective)	electric iron (adjective)
extremely robust

iron (verb)	electric iron (verb)
press and smooth with a heated iron