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

橋脚舟[kyoukyakushuu] pontoon
呉越同舟[goetsudoushuu] bitter enemies (placed by fate) in the same boat
笹舟[sasabune] toy bamboo-leaf boat
舟唄[funauta] sailor's song
舟橋[funahashi] pontoon

舟艇[shuutei] boat
助け舟[tasukebune] lifeboat
小舟[kobune] boat
上陸用舟艇[jourikuyoushuutei] landing craft
渡し舟[watashibune] ferry

家鴨[ahiru] domestic duck
鴨嘴[kamonohashi] platypus (Ornithorhynchus anatinus)
鴨居[kamoi] lintel
鴨打ち[kamouchi] duck hunting
鴨猟[kamoryou] duck hunting

鴨脚樹[ichou] ginkgo (Ginkgo biloba)
真鴨[magamo] mallard (Anas platyrhynchos)
間鴨[aigamo] cross between a mallard and domestic duck
小鴨[kogamo] green-winged teal (species of duck, Anas crecca)