お大事に[odaijini] take care of yourself
暗黒大陸[ankokutairiku] Dark Continent (i.e. Africa)
伊勢大神宮[isedaijinguu] the Grand Shrines of Ise
伊勢大廟[isetaibyou] the Grand Shrines of Ise
偉大[idai] greatness

医科大学[ikadaigaku] medical school
医大[idai] medical university
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一大[ichidai] one large ...
一大事[ichidaiji] serious affair

蝶鮫[chouzame] sturgeon (Acipenser mikadoi)
蝶番い[choutsugai] hinge (e.g. on a door)
蝴蝶[kochou] butterfly
蝶蝶[choucho] butterfly
高山蝶[kouzanchou] alpine butterfly

紋白蝶[monshirochou] small cabbage white butterfly (Pieris rapae)
鳳蝶[agehachou] swallowtail butterfly (esp. the citrus swallowtail butterfly, Papilio xuthus)
赤立羽蝶[akatatehachou] red admiral (butterfly)
蝶貝[chougai] silver-lipped pearl oyster (Pinctada maxima)

鱘鮫[chouzame] sturgeon (Acipenser mikadoi)
鰐鮫[wanizame] ferocious shark
鮫膚[samehada] rough skin (like that of a shark)
鋸鮫[nokogirizame] saw shark (esp. the Japanese saw shark, Prietiophorus japonicus)
青鮫[aozame] shortfin mako shark (Isurus oxyrinchus)

鮫皮[samegawa] sharkskin
小判鮫[kobanzame] remora
葦切鮫[yoshikirizame] blue shark (Prionace glauca, species of circumglobal requiem shark)
角鮫[tsunozame] dogfish (any shark of family Squalidae)