下位互換性[kaigokansei] downward compatibility
互い[tagai] mutual
互いに[tagaini] mutually
互い違い[tagaichigai] alternate
互い違いに[tagaichigaini] alternate

互に[katamini] mutually
互角[gokaku] equality
互換[gokan] transposition
互換性[gokansei] compatibility
互恵[gokei] reciprocity

インスタント食品[insutantoshokuhin] instant foods
コンシューマ向け製品[konshuumamukeseihin] consumer products
コンシューマ製品[konshuumaseihin] consumer goods
スキー用品[sukiiyouhin] ski outfit
レトルト食品[retorutoshokuhin] packed and sterilised food

遺品[ihin] articles of the deceased
遺留品[iryuuhin] lost articles
医薬品[iyakuhin] medical supplies
医療品[iryouhin] medical supplies
一品[ippin] item

アナログデジタル変換器[anarogudejitaruhenkanki] analog-digital converter
データ交換[deetakoukan] data exchange
パリティ変換[paritihenkan] parity transformation (physics)
メール交換[meerukoukan] exchange of letters
意見交換[ikenkoukan] exchange of ideas

引換て[hikikaete] on the contrary
下位互換性[kaigokansei] downward compatibility
かな漢字変換[kanakanjihenkan] kana-kanji conversion (on a computer, etc.)
可換群[kakangun] Abelian group
賀詞交換[gashikoukan] New Year greetings (parties)

コンシューマ向け製品[konshuumamukeseihin] consumer products
コンシューマ製品[konshuumaseihin] consumer goods
亜麻製[amasei] flaxen
鉛製[ensei] leaden
化学製品[kagakuseihin] chemical

外国製[gaikokusei] foreign-made
官製[kansei] government-manufactured
既製[kisei] ready-made
既製服[kiseifuku] ready-made clothes
偽製[gisei] pseudo