天魚[amago] land-locked variety of red-spotted masu trout (Oncorhynchus masou ishikawae)
御天気[otenki] weather
コール天[kooruten] corded velveteen
破天連[pateren] Portuguese Jesuits (in Japan in the 16th century)
天鵝絨[tengajuu] velvet

悪天[akuten] bad weather
悪天候[akutenkou] bad weather
悪天使[akutenshi] evil angels
旭日昇天[kyokujitsushouten] full of vigor and vitality (like the rising sun) (vigour)
一天[itten] the whole sky

吾亦紅[waremokou] burnet
口紅[kuchibeni] lipstick
紅焔[kouen] red flame
紅花[benibana] safflower
紅海[koukai] Red Sea

紅冠鳥[koukanchou] cardinal (bird) (Cardinalis cardinalis)
紅顔[kougan] rosy cheeks
紅唇[koushin] red lips
紅藻[kousou] red algae
紅茶[koucha] black tea

螟蛾[meiga] pyralid (any moth of family Pyralidae, many of which have larvae that devour foodstuffs)
誘蛾灯[yuugatou] light trap for killing insects
毒蛾[dokuga] poisonous moth
夜盗蛾[yotouga] cabbage armyworm
衣蛾[iga] Tinea translucens (species of clothes moth)

黄色雀蛾[kiirosuzume] yellow hawk moth
灯蛾[hitoriga] garden tiger moth (Arctia caja)
尺蛾[shakuga] geometer moth
蚕蛾[kaikoga] silkworm moth