Joina is a relatively uncommon term that typically refers to joining or assembling different parts or objects together. However, there are plenty of other synonyms for joina that can be used to add variety and depth to your writing. These include words like connect, link, fuse, unite, merge, combine, bind, and attach. Each of these words can be used to describe the act of bringing two or more things together, whether they are physical objects, abstract ideas, or groups of people. By using synonyms like these, you can make your writing more interesting and engaging, while still conveying the same basic meaning.