Forums Scripts & Popups $strip words beginning from right instead of left

Trying to solve a problem here but can't find any solution, maybe someone here does.

I have a line to strip a specific word but i can only tell for sure it's the third word from the right instead of left

example:
(a bunch of words, can be 6 but also less or more) [SPECIFICWORD] (always 2 words!)

I tried to strip with using $left $right $strip etc but no way i can get it to start at the end of line instead of beginning.
Is this even possible?