悪循環[akujunkan] vicious circle
一環[ikkan] link (e.g. a part of a larger plan)
印環[inkan] signet ring (in medical contexts, e.g. signet ring cell)
円環[enkan] circle
花環[hanawa] wreath

環境[kankyou] environment
環境グループ[kankyouguruupu] environmental group
環境事業[kankyoujigyou] environmental business
環境庁[kankyouchou] Environment Agency
環境庁長官[kankyouchouchoukan] Director General of Environment Agency

皆既蝕[kaikishoku] total eclipse (of sun by moon)
乾蝕[kanshoku] the rotting of lumber stored with poor air circulation
金環蝕[kinkanshoku] annular eclipse
月蝕[gesshoku] lunar eclipse
蝕む[mushibamu] to eat into (e.g. by worms)

侵蝕[shinshoku] encroachment
日蝕[nisshoku] solar eclipse
氷蝕[hyoushoku] glacial scouring
腐蝕[fushoku] corrosion
分蝕[bunshoku] partial eclipse

御金[okane] money
金糸雀[kinshijaku] canary (esp. the island canary, Serinus canaria)
違約金[iyakukin] penalty for contract breach
一刻千金[ikkokusenkin] every moment is precious
一字千金[ichijisenkin] word of great value

一時金[ichijikin] lump sum
一時賜金[ichijishikin] lump-sum grant
引き金を引く[hikiganewohiku] to pull the trigger
引当金[hikiatekin] reserves
隠れ借金[kakureshakkin] hidden debts

御食い初め[okuizome] weaning ceremony
食っ付く[kuttsuku] to adhere to
食っ付ける[kuttsukeru] to attach
ぼりぼり食べる[boriboritaberu] to eat with a munching or crunching sound
インスタント食品[insutantoshokuhin] instant foods

レトルト食品[retorutoshokuhin] packed and sterilised food
衣食[ishoku] food and clothing
衣食住[ishokujuu] necessities of life (food, clothing & shelter)
育児食[ikujishoku] baby food
一夜乞食[ichiyakojiki] (a) person made homeless by fire