fire iron vs shovel

fire iron and shovel both are nouns.

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

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

fire iron: metal fireside implements
shovel: a fire iron consisting of a small shovel used to scoop coals or ashes in a fireplace

Other hyponyms of fire iron include coal tongs, fire tongs, fire hook, poker, salamander, stove poker.

fire iron (noun)	shovel (noun)
metal fireside implements	a hand tool for lifting loose material; consists of a curved container or scoop and a handle
	a fire iron consisting of a small shovel used to scoop coals or ashes in a fireplace
	a machine for excavating
	the quantity a shovel can hold

fire iron (verb)	shovel (verb)
	dig with or as if with a shovel