吉凶[kikkyou] sunshine and shadow
凶音[kyouin] bad news
凶荒[kyoukou] poor crops
凶歳[kyousai] poor crop year
凶作[kyousaku] bad harvest

凶事[kyouji] calamity
凶宅[kyoutaku] unlucky house
凶兆[kyouchou] evil omen
凶党[kyoutou] gang

アナログデジタル変換器[anarogudejitaruhenkanki] analog-digital converter
パリティ変換[paritihenkan] parity transformation (physics)
異変[ihen] unusual phenomenon
移り変り[utsurikawari] change (e.g. season)
一定不変[itteifuhen] invariable

一風変った[ippuukawatta] eccentric
一変[ippen] complete change
黄変米[ouhenmai] spoiled rice
化学変化[kagakuhenka] chemical change
かな漢字変換[kanakanjihenkan] kana-kanji conversion (on a computer, etc.)