سلام جک !
سپاسگزارم Se-pas Go-Za-Ram (Sepas Gozaram) = I'm Thankful= Mamnoon, Merci, Motshakkeram but it has a Persian root.
درود | Do-rood( Dorood)= Hail, Greet= Salaam. This one is pure Persian too.
I believe you meant some words like these, right?
If so, I think you should ask more detailed questions, Cause there are lots of Pure Persian words which are also useful. Thus, I suggest you to ask the ones that you are going to use right at this time. In this way you'll get plenty of good answers to your questions too.
موفق باشی
حسن