What is another word for "crack"?

Roget's Thesaurus (1911) lists these synonyms for "crack": abra, absence, abuse, abysm, abyss, acrobat, adept, admirable, all, anagram, arcanum, barranca, between, bisulcate, bisulcous, bite, blade, book, breach, breachy, break, business, caesura, campaigner, canaliculated, canon, catch, chamfer, channel, chap, charade, chasm, chef, chink, clean, cleft, clove, concealed, confidential, conjuror.