And also, how to rename the assorted lists once.. I just want to make one category like "my lists( in words)" and put all lists of words under that category..is there a option?
(Assorted Lists) contains the lists not in a set so you can't rename it.
But, it sounds like you want to make a set of lists.
To do that, go into each individual list -> edit list -> this list is part of a set -> select the set it is part of (or make a new set for the first one) -> save
To rename a set use Resources -> Reading Buddy -> click on gear beside set -> change the name
What if I want to remove all this list and make it under the only one list I have created ? so that I could put "My words" under the list I created... And How to delete study pad?
The Reading buddy you said is for renaming the lists in bulk ( aside from its main user )Ig right?
None of the special sets or lists can be deleted or renamed
If you want to move the contents of My words to a list, you can use the Advanced search tool. (Add Words -> My Words, Actions -> List)
The Reading buddy is not for renaming lists in bulk. However, you can rename lists one by one using it, and it is the only way to rename a set (at least as far as I know).
Thx again...From advanced search I could move "My words" under "my list" and I can do it with study pad too.. And this bothers me...is this normal or not? it kinda looks moved
Yes I think reading buddy is the only way the rename a list, unless created one
yes those my words still remain..I just created a cpy and then pasted it under my list 
ok