お花見[ohanami] cherry blossom viewing
一花[hitohana] success
卯の花[unohana] bean-curd lees
雲鬢花顔[unbinkagan] beautiful woman (metaphorical)
黄花[kouka] chrysanthemum

火花[hibana] spark
花の木[hananoki] flowering tree
花瓣[hanabira] (flower) petal
花より団子[hanayoridango] dumplings rather than flowers

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)