English is an expansive language, anyone who has seen the size of an unabridged English dictionary can tell you that. It's also a language that's ever changing and evolving, so of course there are some words that fall out of favor and are hardly ever used, but maybe it's time to bring some of them back!
What are your most common feelings? Mine are Monachopsis and Onism
Mindfulness involves noticing, without self-criticism or judgment, the bodily sensations, thoughts, and emotions that are coming up. Check here some ways to avoid overthinking: https://mind-globe.com/ways-lessen-runaway-thoughts/