breaking vs splintering

breaking and splintering both are nouns.

Word	Noun	Adjective	Verb	Adverb
breaking	Yes	No	No	No
splintering	Yes	No	No	No

As nouns, splintering is a hyponym of breaking; that is, splintering is a word with a more specific, narrower meaning than breaking:

Other hyponyms of breaking include rupture, shattering, smashing, crack, cracking, fracture, chip, chipping.

breaking (noun)	splintering (noun)
the act of breaking something	the act of chipping something