fracture vs refracture

fracture is a noun but refracture is not a noun.

Word	Noun	Adjective	Verb	Adverb
fracture	Yes	No	Yes	No
refracture	No	No	Yes	No

As verbs, refracture is a hyponym of fracture; that is, refracture is a word with a more specific, narrower meaning than fracture:

fracture: fracture a bone of
refracture: break (a bone) that was previously broken but mended in an abnormal way

fracture (noun)	refracture (noun)
the act of cracking something
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
breaking of hard tissue such as bone

fracture (verb)	refracture (verb)
fracture a bone of	break (a bone) that was previously broken but mended in an abnormal way
become fractured
violate or abuse
break into pieces
interrupt, break, or destroy