dew
asp
niv
Lee
The
A three letter word that ends in the letter x could be the word Hex. A hex is a witches curse or spell.
asp
emu eau ecu
Dud
To my mind right now, there is no word of your request.
One example of a three-letter word that starts with "a" and ends with "o" is "ago."
Dun. Something of an archaic term, thesedays.
Lee
niv
The
SPA
The only English word that ends with "gab" is the 3-letter word GAB.
The only English words that fit those requirements are tee, the, tie and toe.