How to find a word from arrays of characters?

What is the best way to solve this:

I have a group of arrays with 3-4 characters inside each like so:

{p,     {a,    {t,    {m,
 q,      b,     u,     n,
 r,      c      v      o
 s      }      }      }
}

I also have an array of dictionary words.

What is the best/fastest way to find if the array of characters can combine to form one of the dictionary words? For example, the above arrays could make the words:

"pat","rat","at","to","bum"(lol)
but not "nub" or "mat"

Should i loop through the dictionary to see if words can be made or get all the combinations from the letters then compare those to the dictionary