- life vest
- life jacket
- Large Magellanic Cloud
- lycanthropy
- Libyan monetary unit
- Lesotho monetary unit
- Lebanese monetary unit
- Laotian monetary unit
- Latvian monetary unit
- Lithuanian monetary unit
- largess
- largesse
- liberalness
- lord's supper
- lordliness
- leanness
- lockstitch
- lexical database
- Lamna nasus
- landholder
- line of force
- line of longitude
- loftiness
- large flowering magnolia
- large_leaved magnolia
- large_leaved cucumber tree
- Lardizabalaceae
- laurel family
- lardizabala family
- Lauraceae
- Laurus
- Lardizabala
- Lindera
- Liriodendron
- lizard's_tail family
- lobelia family
- Linaceae
- loosestrife family
- Lythraceae
- Lobeliaceae
- leadwort family
- Loganiaceae
- Leitneriaceae
- Lecythidaceae
- Lysimachia
- Leucadendron
- Logania
- Laportea
- Ligustrum
- Lambertia