臼: 臼 兒 舁 毀 舄 舅 盥 輿
臾 叟

興: 興 釁 爨 璺

壆: 壆 學 嚳 覺 鱟 黌

與: 與 舉 譽 鸒

鼠: 鼠 鼴 鼷 鼪 鼢 鼯 鼫 鼬

Above characters begin with the 臼 shape.

Large groups of characters are subsorted first via second element using:
囗⺆凵𠄌
乛厂丿丶
八一丨十
Then via trailing element using:
口山乚
⺆𠃌亅
丿丶㇏乂八小
丨一土十