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| 凹所; 凹溜まり; 窪溜まり; 空洞 news1 nf11 (くうどう); 凹み spec1 (くぼみ); 窪み ichi1 (くぼみ); 凹地; 窪地; くぼ地 (くぼ・ち); 刳り; 虚 (uro); 空 (そら); 洞 (うつろ); 窪 | |||
| 穴ぼこ; 穴凹 esp. 穴ぼこ | |||
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| 掘る ichi1 news2 nf27 (ほる); 刳り貫く; 刳り抜く; 刳貫く io; くり抜く; 刳抜く io; 凹窩 Life Science Dictionary (Shuji Kaneko) | |||
| 中空 (ちゅうくう); 中空部 (ちゅうくう・ぶ); 空胴 (kūdō); 空洞 (くうどう) | |||
| 刳 (くり); 繰 (くり) | |||
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| 真空 news1 nf19 (shinkū); 中空 news2 nf31 (ちゅうくう); 中低; 虚ろ; 空ろ; 洞ろ | |||
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| ボコボコ (sounding); ぼこぼこ (sounding); ポコポコ (sounding); ぽこぽこ (sounding) | |||
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| 穴あき (あな・あき); 穴開き; 穴明き | |||
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| スカスカ; すかすか | |||
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| 凹 (くぼ) | |||
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| 空っぽ ichi1 news2 nf27 | |||
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| 鬆 | |||
| English thesaurus | |||
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| hw | |||
|
hollow : 93 phrases in 13 subjects |
| Buddhism | 2 |
| Computers | 1 |
| Construction | 9 |
| Electric traction | 1 |
| General | 53 |
| Geography | 1 |
| Isolation | 1 |
| Physics | 4 |
| Power lines | 1 |
| Radiology | 1 |
| Superconductivity | 1 |
| Technology | 17 |
| Thermal Energy | 1 |