阿吽の呼吸[aunnokokyuu] the harmonizing, mentally and physically, of two parties engaged in an activity
歓呼[kanko] acclamation
関数呼出し[kansuuyobidashi] function call
呼び回る[yobimawaru] to call out (for someone)
呼び覚ます[yobisamasu] to wake up

呼掛ける[yobikakeru] to call out to
呼寄せる[yobiyoseru] to call
呼起す[yobiokosu] to wake someone (by calling for them)
呼び迎える[yobimukaeru] to send for
呼び込む[yobikomu] to call in

哀歓[aikan] joys and sorrows
歓心を買う[kanshinwokau] to win favour
歓楽[kanraku] pleasure
歓楽街[kanrakugai] pleasure quarter
歓喜[kanki] delight

歓迎[kangei] welcome
歓迎会[kangeikai] welcome party
歓呼[kanko] acclamation
歓心[kanshin] favour
歓声[kansei] cheer