nonfunctioning
That's awful vague.
dozen
There are no 5 letter words containing uu. The 6 letter word vacuum is the shortest word that contains the letters uu.
CHIA
A five letter word containing N, K, and U is: plunk
divvy
Ticks
Leaders, readers.
Some five letter words containing the letters o and v are: Volvo Rover Voles Devon Vocal
eerie, geese
twice
Um... 5? Why?