Every word in the English language that begins with the letter "q" is followed by a "u." So, the ideal place to locate words that begin with 'qu' would be an English dictionary.
Qi
Quilt Quail
Some words are:QueenQuilQuestionQuiltQuidQuinQuipQuit
quick, queer, queue, queen, quack, quibble, question
Quaint quays quietly acquiescing to the aquamarine's quintessential fury. Quadrants with quills apparent.
Some 'qu' words beginning with the letter 'I' are:inquestinquiryinequityinquisitiveIroquois
Words beginning with QU and ending in N:QueenQuadrillionQualificationQuestionQuicken
There are no words that start with the letter N and have a QU in it. There are not many words that do have a QU in them. When QU is in a word, it is more commonly at the beginning.
quickens, quashing
I can only think of :headquarters
The site listed below has a lengthy list of ALL the words in English that contain the letters Qu.
Things that start with the same sound as blue
Quail.
grotesque
torque
quilt
There are no English words that meet the criteria.