F=4 points, A=1 point, E=1 point, blank (substitute for Z)=0.
By adding the assigned value of each tiles (total is six (6) points) multiply by two (2) the score is twelve (12) points.
It's worth 0 points. It doesn't matter what letter you are using it as. Answer: If you mean a blank tile, it is worth zero (0) point. However, if you mean a blank square on the scrabble board, the points would depend on the assigned value of the letter tile laid on it.
A seven letter word starting with R and ending with O is risotto.
repaper
stencil
seesaw
Fish
prairie
Sites
bellwort
ladybirds, calyptras, kalyptras, capybaras
canula
Treat