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

瓜二つ[urifutatsu] as alike as two melons (two peas in a pod)
天糸瓜[hechima] sponge gourd
水瓜[suika] watermelon
破瓜[haka] age 16 (girl)
破瓜病[hakabyou] hebephrenia (disorganized schizophrenia) (disorganised)

木瓜[boke] (Chinese) flowering quince
南瓜[kabocha] pumpkin
黄瓜[kyuuri] cucumber
天瓜粉[tenkafun] talcum powder

金糸雀[kinshijaku] canary (esp. the island canary, Serinus canaria)
亜麻糸[amaito] flax yarn
綾糸[ayaito] colored thread
一糸[isshi] string
一糸まとわぬ[isshimatowanu] stark naked

一糸一毫[isshiichigou] tiny amount
下糸入れ[shitaitoire] shuttle
菌糸[kinshi] fungal filament
結紮糸[kessatsushi] ligature
原糸[genshi] thread for weaving