What do the following words have in common?

BELL

FILL

SICK

TAKE

HIP

WEST

PART

RIVER

HINT:

It has to do with the first letter of each word.

Answer:

The first letter of each word can be replaced by QU to give new words.

Credit: NY Times Crossword - July 25, 2004

Brendan Emmett Quigley - CUED IN