Lump
labyrinth
loquacious
lake
There is a chocolate company called Lindt.
it starts whith a l and finishes on cs
Laplanders
Lhotse (Nepal), La Sal (Utah), Laguna (California), Laramie (Wyoming) and Lebombo (Mozambique) are mountains. They begin with the letter L.
A sport that starts with L that girls might play in school is lacrosse. It's not particularly posh.
Lands End
A large grazing area
Lentil
deee of course there is its called licking a di ck