It's a good idea to browse the google store
when looking for apps. You can find out what is available, a summary of what they do, how many people have downloaded them, user reviews, similar apps etc. It is really easy to install apps and try them (if there is a free version), and then uninstall the ones you don't want.
In this case there are "Office" type products such as Kingsoft Office (which is free) and OfficeSuite Pro (which is paid for, but with a free trial). These have quite powerful word processors. There are also lots of apps for making and organising text, notes, lists, organisers, mind maps and more, where the text side of things is much simpler than in a word processor, but may be better for you depending on exactly what you need to achieve because of the way they can help you organise and manage notes, ideas, to do lists, reminders etc.