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.