What is another word for "gulf"?

Roget's Thesaurus (1911) lists these synonyms for "gulf": abra, absence, abysm, abysmal, abyss, and, ankle, arm, armlet, artesian, barranca, bathometer, bathymetry, bay, bayou, belt, benthal, between, beyond, bight, bottomless, breach, breachy, break, broad, caesura, canon, cast, chap, chasm, chink, cleft, clove, concavity, continental, cove, covered, crack, cranny, crater.