What is another word for "interspace"?

Roget's Thesaurus (1911) lists these synonyms for "interspace": abdomen, abdominal, abra, absence, abysm, abyss, backbone, barranca, belly, between, bosom, breach, breachy, break, breast, caesura, canon, cave, center, chap, chasm, chink, circumscribe, cleft, clove, coeliac, concavity, contents, crack, cranny, creek, crevasse, crevice, cut, deep, defile, dike, domestic, endemic, entrails.