fencing sword vs sabre

fencing sword and sabre both are nouns.

Word	Noun	Adjective	Verb	Adverb
fencing sword	Yes	No	No	No
sabre	Yes	No	Yes	No

As nouns, sabre is a hyponym of fencing sword; that is, sabre is a word with a more specific, narrower meaning than fencing sword:

Other hyponyms of fencing sword include epee, foil, saber.

fencing sword (noun)	sabre (noun)
a sword used in the sport of fencing	a stout sword with a curved blade and thick back
	a fencing sword with a v-shaped blade and a slightly curved handle

fencing sword (verb)	sabre (verb)
	kill with a saber
	cut or injure with a saber