gusset vs chain armor

gusset and chain armor both are nouns.

Word	Noun	Adjective	Verb	Adverb
gusset	Yes	No	No	No
chain armor	Yes	No	No	No

As nouns, chain armor is a hypernym of gusset; that is, chain armor is a word with a broader meaning than gusset:

Other hypernyms of gusset include chain armour, chain mail, mail, ring armor, ring armour, ring mail.

gusset (noun)	chain armor (noun)
a piece of material used to strengthen or enlarge a garment	(Middle Ages) flexible armor made of interlinked metal rings
a metal plate used to strengthen a joist
a piece of chain mail covering a place unprotected by armor plate