Jovial jewel
A couple words beginning with the letter J describing a nice lady would be such examples as "jovial" and "jubilant."
Jerk
Jaw
jonquil
Some 5-letter words beginning with 'j' are:jabotjauntjazzyjeansjellyjennyjettyjeweljiffyjimmyjointjoistjokerjollyjoulejoustjowlyjudgejuicejuicyjulepjumbojumpyjunkyjuror
Jaunt.
Java
jingle...jangle
There are no words in the English language that begin and end with the letter j.
Jesu
jackpot
Jackal, jaguar, jellyfish and jungles are scary. They begin with the letter J.