gauntlet vs metal glove

gauntlet and metal glove both are nouns.

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

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

Other synonyms of gauntlet include gantlet.

gauntlet (noun)	metal glove (noun)
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 of armored leather; protects the hand
a glove with long sleeve
to offer or accept a challenge