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

遺告[yuigou] will
戒告[kaikoku] admonition
勧告[kankoku] advice
勧告案[kankokuan] recommendation
勧告者[kankokusha] adviser

勧告状[kankokujou] letter of advice
求婚広告[kyuukonkoukoku] matrimonial advertisement
求妻広告[kyuusaikoukoku] advertisement for a wife
求職広告[kyuushokukoukoku] situation-wanted advertisement
求人広告[kyuujinkoukoku] help wanted advertisements