永久歯[eikyuushi] permanent tooth
永久性[eikyuusei] permanency
永久脱毛[eikyuudatsumou] removing hair permanently
久しい[hisashii] long
久しく[hisashiku] for a long time

久し振りに[hisashiburini] after a long time
久し振り[hisashiburi] a long time (since the last time)
久懐[kyuukai] long-cherished hope
久慈目[kujime] spotbelly greenling (Hexagrammos agrammus)
久方[hisakata] sky

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

雨子[amago] land-locked variety of red-spotted masu trout (Oncorhynchus masou ishikawae)
ひと雨[hitoame] shower
雨雲[amagumo] rain cloud
雨蛙[amagaeru] tree frog (esp. the Japanese tree frog, Hyla japonica)
雨笠[amagasa] rain hat

雨具[amagu] rain gear
雨空[amazora] rainy sky
雨靴[amagutsu] waterproof shoes
雨戸[amado] sliding storm shutter