martingale vs saddlery

martingale and saddlery both are nouns.

Word	Noun	Adjective	Verb	Adverb
martingale	Yes	No	No	No
saddlery	Yes	No	No	No

As nouns, saddlery is a hypernym of martingale; that is, saddlery is a word with a broader meaning than martingale:

martingale: a harness strap that connects the nose piece to the girth; prevents the horse from throwing back its head
saddlery: gear for a horse

Other hypernyms of martingale include stable gear, tack.

martingale (noun)	saddlery (noun)
a harness strap that connects the nose piece to the girth; prevents the horse from throwing back its head	gear for a horse
spar under the bowsprit of a sailboat	workshop where a saddler works