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.)

肝硬変[kankouhen] cirrhosis of the liver
強硬[kyoukou] firm
強硬派[kyoukouha] diehards
硬い[katai] hard
硬化[kouka] hardening

硬貨[kouka] coin
硬球[koukyuu] hard ball
硬玉[kougyoku] jadeite
硬骨[koukotsu] bone
硬式[koushiki] hardball (tennis, baseball)