复元字符oa在重读音节中读[u]音(规则编号6-20）
afloat 浮着	afloat 词源float
approach 接近	approach
boast 自夸 boat 船 cloak 斗篷 coach 教练 coal 煤 coast 海岸 coastal 沿海的 coat 外套 cocoa 可可粉 float 飘浮 foam 泡沫材料 goal 目标 goat 山羊 groan 呻吟 hoax 欺骗 愚弄 load 装载 负荷 loaf (一块)面包 moan 呜咽 oak 橡树 oat 燕麦 oath 誓约 overcoat 大衣 road 路 roast 烤 soak 浸 soap 肥皂 throat 喉 toad 癞蛤蟆 toast 烘烤 祝酒	boast boat cloak coach coal coast coast-al 词源coast coat co-coa float foam goal goat groan hoax load loaf moan oak oat oath over-coat road roast soak soap throat toad toast