1. Not required by rule or law
   - nonmandatory

See also: optional

• Lugh
• lughole
• luging
• Lugosi
• lugsail
• lugubrious
• lugubriously
• lugubriousness
• lugworm
• Luigi Barnaba Gregorio Chiaramonti
• Luigi Cherubini
• Luigi Galvani
• Luigi Pirandello
• Luik
• Luis Bunuel
• Luis de Gongora y Argote
• Lukasiewicz notation
• Luke
• lukewarm
• lukewarmly
• lukewarmness
• Lule Burgas
• lull
• lullaby
• Lulli