What is another word for "fissure"?

Roget's Thesaurus (1911) lists these synonyms for "fissure": abra, absence, abysm, abyss, barranca, between, breach, breachy, break, caesura, canon, chap, chasm, chink, cleft, clove, crack, cranny, creek, crevasse, crevice, cut, defile, dike, far, flaw, frith, furrow, gap, gape, gash, gorge, gulch, gulf, gully, ha-ha, hiatus, hole, incompleteness, inlet.