愛憎併存[aizouheison] ambivalence
兼併[kenpei] uniting
併せる[awaseru] to match (rhythm, speed, etc.)
合併症[gappeishou] complications (in an illness)
併し[shikashi] however

併し乍ら[shikashinagara] however
併せて[awasete] in all
併せ考える[awasekangaeru] to consider together
併せ用いる[awasemochiiru] to use jointly
併も[shikamo] moreover

開催[kaisai] holding a meeting
開催式[kaisaishiki] opening ceremony (of an event, show, etc.)
開催中[kaisaichuu] in session
共催[kyousai] joint sponsorship
催し[moyooshi] event

催物[moyoushimono] points of interest
催す[moyoosu] to hold (a meeting)
催淫剤[saiinzai] aphrodisiac
催合う[moyau] to co-operate (in enterprises)
催告[saikoku] notification