I am looking far a synonym for jump

I agree with Liis that "alok" is probably closest to "jump," but it may help to have the context of the whole sentence. Dovahzul can rarely be translated word-for-word, and a full understanding of the context plays a huge part in translations.

In the sentence it will turn into jumper being used as: The small furry jumper was the only bit of peace in the land/area.