Doubtful is a 8 letter English word. It's valid Scrabble word worth 14 points. It's valid Words with friends word worth 18 points.
You can make 134 anagrams from letters in doubtful (bdflotuu).
First recorded in 1350-1400, doubtful is from the Middle English word douteful. See doubt, -ful
But it is doubtful anyone will ever prove who poisoned Arafat, if poisoned he was.
It's doubtful there would have been enough fortification and firepower under any circumstances.
It is doubtful that any Churchill-like figure—were one available—could thrive.
In the broad pathways of the ocean such a chance is doubtful.
And, if we do, it is doubtful if we can attract their attention.
It is doubtful if it was mentally prepared to entertain it, or evolve the idea.
It is doubtful if many of the others were any better off in this respect.
It's doubtful that they have any serious political disagreements.
My errors, however, have at least made me cautious and doubtful of my own conclusions.
Whether the vote in a rump referendum over the weekend genuinely reflected public opinion in the eastern-most regions is doubtful.