faulting vs fissure

faulting and fissure both are nouns.

Word	Noun	Adjective	Verb	Adverb
faulting	Yes	No	No	No
fissure	Yes	No	Yes	No

As nouns, fissure is a hypernym of faulting; that is, fissure is a word with a broader meaning than faulting:

faulting: (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
fissure: a long narrow cleft

Other hypernyms of faulting include cleft, crack, crevice, scissure.

faulting (noun)	fissure (noun)
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other	(anatomy) a long narrow slit or groove that divides an organ into lobes
	a long narrow cleft
	a long narrow depression in a surface

faulting (verb)	fissure (verb)
	break into fissures or fine cracks