ない交ぜにする[naimazenisuru] to blend (e.g. truth and lies)
データ交換[deetakoukan] data exchange
メール交換[meerukoukan] exchange of letters
リーダー交代[riidaakoutai] leadership change
意見交換[ikenkoukan] exchange of ideas

一方交通[ippoukoutsuu] one-way traffic
羽交絞め[hagaijime] pinioning
仮名交じり[kanamajiri] mixed writing (characters and kana)
仮名交じり文[kanamajiribun] mixed writing (characters and kana)
賀詞交換[gashikoukan] New Year greetings (parties)

お風呂に入る[ofuronihairu] to take a bath
鍬入れ式[kuwaireshiki] ground-breaking ceremony
塵入[gomiire] trashcan
キー入力[kiinyuuryoku] key (input)
ビジネススクール入学共通試験[bijinesusukuurunyuugakukyoutsuushiken] business school entrance test

メスを入れる[mesuwoireru] to operate
圧入[atsunyuu] indentation
移入[inyuu] importation
一寝入り[hitoneiri] nap
一入[hitoshio] still more

固唾を呑む[katazuwonomu] to hold one's breath (in fear, anxiety, etc.)
唾き[tsubaki] saliva
唾液[daeki] saliva
眉唾物[mayutsubamono] fake
唾液腺[daekisen] salivary gland

生唾[namatsuba] saliva (in one's mouth)
唾棄[daki] contemptuous
虫唾[mushizu] heartburn
虫唾が走る[mushizugahashiru] to be disgusted with (wouldn't touch with a pair of tongs)
固唾[katazu] saliva held in one's mouth during times of tension