Hi, Kim. Great question! 🙂
Please understand that because this is a customization rather than a troubleshooting issue we can only provide limited support. We do have a tutorial that will help you change the heading on the calendar views that include the word “events”: https://theeventscalendar.com/altering-or-removing-headings-on-calendar-views/. You can also change the slugs for the calendar events in the Settings page on the admin screens of your site. That should get rid of the word “events”.
As for changing “tickets”, I’m not certain where you would need to go for that, but I’m sure that it would be a large undertaking as that word is used through many different files. It’s possible that you could do something with a translation, but I’m not really an expert on that. I’d encourage you to check out our docs and Themer’s Guide, linked under Useful Resources in the sidebar. It may be that you can get some help in the translation forum, too.
Hope that helps!