No. Qu is not a valid Scrabble word.
Yes. Speculate is a valid Scrabble word.
Nope. Indew is not a valid Scrabble word.
Yes, "ax" is a valid Scrabble word.
Yes, "keyword" is a valid Scrabble word.
Yes, "Scrabble" is considered a valid word in the game of Scrabble.
Yes. Ex is a valid Scrabble word.
No. Oz is not a valid Scrabble word.
Yes, "lez" is a valid word in the game of Scrabble.
Yes, "yep" is a valid word in Scrabble. It is an informal term for "yes" and is recognized in many standard English dictionaries. Players can use it to earn points, provided they place it on the board according to the game's rules.
No. Xe is not a valid Scrabble word.
Yes, "bingo" is considered a valid word in the game of Scrabble.