splinter vs dissever

splinter is a noun but dissever is not a noun.

Word	Noun	Adjective	Verb	Adverb
splinter	Yes	No	Yes	No
dissever	No	No	Yes	No

As verbs, dissever is a hypernym of splinter; that is, dissever is a word with a broader meaning than splinter:

Other hypernyms of splinter include carve up, divide, separate, split, split up.

splinter (noun)	dissever (noun)
a small thin sharp bit of wood or glass or metal

splinter (verb)	dissever (verb)
break up into splinters or slivers	separate into parts or portions
withdraw from an organization or communion
divide into slivers or splinters