According to the Official Scrabble Players Dictionary, 4th Edition, there are seven words that end with the letter 'j', and the only vowel found in each of them is the letter 'a'.
dreamt
The only two letter word using Q is 'QI', there's no two-letter word ending in Q.
RYTHM
The longest English words you can make using only those letters are five-letter words: badge, cadge, caged, decaf, faced, fadge
ion onion
ketchup i only know one sry
xenia is the only English word that ends with those letters. Here are two six-letter words that contian the letters: xenial, xenias.
The only American English word that contains those letters is AZURE; there are no 6 or 7 letter words.
dreamt
Somebody cheated you. Four words end with -eny in english: deny larceny progeny teeny
The only two letter word using Q is 'QI', there's no two-letter word ending in Q.
The letters spell the word calked. They also spell the word lacked.
water
I can only find one in Webster's Second International, and it's an abbreviation: grep '^.of$' /usr/share/dict/words lof
Pisa
jo jeoeo fo EDIT: There are no Scrabble legal words that start with J, end in O, and are only three letters long.
Words that can be made with the letters 'coeivn' are:coinconconecovecoveneonIiceiconinionnicenonoviceononceoneovenveinvicevievinevoice---The only 6-letter anagram is "novice."