This sounds like OCD to me. OCD doesn't just mean always cleaning and putting things in order. Below is a checklist of behaviours. You my be surprised to find that there are several forms of OCD and it isn't just about being fastidiously clean and neat, etc.

https://www.google.ca/url?sa=t&sourc...oo5PRufa_R-2ww

As for switching up words I do that all the time and credit it to the medication I take.