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

暗雲[anun] dark clouds
闇雲[yamikumo] recklessly
いわし雲[iwashigumo] cirro-cumulus
雨雲[amagumo] rain cloud
雲隠れ[kumogakure] disappearance

雲影[unei] cloud shape
雲海[unkai] sea of clouds
雲間[kumoma] rift between clouds
雲形[kumogata] cloud formations