metal glove vs gauntlet

metal glove and gauntlet both are nouns.

Word	Noun	Adjective	Verb	Adverb
metal glove	Yes	No	No	No
gauntlet	Yes	No	No	No

As nouns, metal glove and gauntlet are synonyms defined as:

Other synonyms of metal glove include gantlet.

metal glove (noun)	gauntlet (noun)
a glove of armored leather; protects the hand	a form of punishment in which a person is forced to run between two lines of men facing each other and armed with clubs or whips to beat the victim
	a glove of armored leather; protects the hand
	a glove with long sleeve
	to offer or accept a challenge