Using a caching plugin like WP Super Cache, W3 Total Cache, or WordFence's built-in caching could help. The thing which helped me the most was changing my PHP version to PHP 7, and selecting "Compress all content" on the "Optimize Website" page in cPanel. I saw massive speed increases in WordPress after that. If you switch the PHP version it's a good idea to test your site afterwards to make sure nothing broke, but it went off without a hitch in my case.