Here is a list of nouns that start with LU.
lubricant, lubrication, lucidity, luck, lucy
lug, luggage, lull, lullaby, lulu
lumber, lumen, luminescence, luminosity, lummox
lump, lunation, lunch, luncheon, lunchroom
lunchtime, lung, lurch, lure, lust
luster, lustre, lute, luxuriance, luxury
Hope you enjoy this page of nouns that start with lu and the rest of this noun list a-z site as well.
Help make this a better resource by adding more nouns in the comments section. Thanks.