How to read: ようがんどうくつ
Pronunciation: 
Names and idioms with total stroke of 43:
過燐酸 御簾越 途方途轍 新古典学派 家蜚蠊
Names and idioms similar to 溶岩洞窟:
菟田野岩崎 滝岩 鯨岩 三清洞 粗面岩
Yojijukugo(idioms with 4 Kanji characters) including 溶岩洞窟:
桃源洞裡 洞房花燭 洞房華燭
Proverbs including 溶岩洞窟:
一念岩をも通す 念力岩をも通す 洞ケ峠を決め込む
Check stroke order for the words below:
昌保 宇目大平 岩作白針 鍛治貝 常盤津 詩腸鼓吹 貯蔵葉 百王