The 8 words, in the order I selected, are:
FOOL TOOL TOLL TOOT LIFT IFFY FOIL OILY
Start by selecting the first 4 letters in the top row "FOOL", and continue selecting letters in the order above, working first towards the bottom left, then right. There is only one solution, so if at any point you aren't able to find the next word in the list above, a wrong choice was made somewhere along the line - in which case, just undo your selections and try a different direction or starting letter on a previous word.
The Second Hex Solution