Lots of very strange-sounding but valid words as per the official dictionary:
Ajowan
Deewan
Seawan
Dewan
Diwan
Gowan
Jawan
Rewan
Rowan
Sewan
Hwan
Swan
There are no Scrabble words that end with HB.
There are no English Scrabble words that end with OFICE.
There are no English words that end with the letters EJ.
Some scrabble words that end with Z are:adzblintzblitzbuzzchintzditzfezfizzfrizzfuzzglitzjazzkibbutzpizazzquartzquizRitztopazwaltzwhiz
There are no English Scrabble words that end with BZA.
There are no English Scrabble words that end with IJ.
There are no English Scrabble words that end with WIR.
There are no words in the official Scrabble dictionary that end in fim.
There are no scrabble words that end with the letters iy.
"NEEM" is a valid Scrabble word, but there are no words that end with it.
There are no words in the official Scrabble dictionary that end with UUG.
Some Scrabble words that end with 'irt' are:dirtflirtshirtskirtsquirt