御召[omeshi] summoning
御召し物[omeshimono] clothing
応召[oushou] respond to a call for military service
召人[meshuudo] prisoner
召し[meshi] summons

召し寄せる[meshiyoseru] to call (someone) to you
召使う[meshitsukau] to employ
召し集める[meshiatsumeru] to call together
召し出す[meshidasu] to call out
召し上がり物[meshiagarimono] food

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)