well technically speaking, some find the name "Lucifer" scary. and "leviathan" struck fear into sailors back in biblical times. other than those I really dont know of any scary words that begin with the letter "L" sorry if I was not that much of a help.
Scary things that start with the letter L;
Lollipops are a candy for the trick-or-treat bag. It begins with the letter L.
Some people are afraid of lightening, some are afraid of lions and leopards. Lung Cancer, Losing, Letting go, Lizards, Love.
jufe u think
Loch Ness Monster
Leprechauns
lust
Lap is a word that begins with the letter L and rhymes with cap.
listless
love
Longjohns
logic
Latex is a 5 letter word. It begins with L and ends with X.
Love and laugh are desirable words. They begin with the letter l.
leader
ligament
Ural
little dipper
Large