- Luton
- Luton Hoo
- lutose
- Lutosławski
- Lutsk
- Lutuamian
- Lutyens
- lutz
- Lutz
- Lützen
- Lützow-Holm Bay
- luv
- LUV
- luvvie
- Lu-Wang school
- Luwian
- lux
- Lux.
- luxate
- luxe
- Luxembourg
- Luxembourger
- Luxembourgian
- Luxemburg
- Luxor
- luxulianite
- Lu Xun
- luxuriance
- luxuriant
- luxuriate
- luxurious
- luxury
- luxury tax
- Luzern
- Luzhou
- Luzon
- Luˈsatian
- lv
- Lv
- LV
- lv.
- LV.
- LVAD
- Lviv
- LVN
- Lvov
- LVP
- Lw
- LW
- L wave
- lwei
- lwl
- LWM
- Lwoff
- lwop
- Lwów
- lwp
- LWV
- lx
- LXX
- ly
- Lyallpur
- lyam-hound
- lyard
- lyase
- Lyautey
- lycanthrope
- lycanthropy
- Lycaon
- Lycaonia
- lycée
- lyceum
- Lyceum
- lychee
- lych gate
- lychnis
- lychnoscope
- Lycia
- Lycian
- lycine
- lycopene
- Lycopene
- lycophyte
- lycopod
- lycopodium
- lycoris
- lycosid
- Lycra
- Lycurgus
- Lydda
- lyddite
- Lydgate
- Lydia
- Lydian
- Lydian mode
- lye
- lyefish
- lye hominy
- Lyell
- Lyell, Charles
- lygaeid
- lying
- lying down
- Lying Flat
- lying-in
- lyke-wake
- Lyle
- Lyly
- Lyman
- Lyme disease
- lyme grass
- lyme-hound
- Lyme Regis
- Lymington
- lymph
- lymph-
- lymphadenectomy
- lymphadenitis
- lymphadenoma
- lymphadenopathy
- lymphadenopathy-associated virus
- lymphangi-
- lymphangial
- lymphangiography
- lymphangioma
- lymphangitis
- lymphatic
- lymphatic system
- lymphatic tissue
- lymphatolysis
- lymph cell
- lymphedema
- lymph gland
- lymph node
- lymph nodes
- lympho-
- lymphoblast
- lymphocyte
- lymphocytopenia
- lymphocytosis
- lymphogranuloma
- lymphogranulomatosis
- lymphography
- lymphoid
- lymphoid cell
- lymphoid tissue
- lymphokine
- lymphokine-activated killer cell
- lymphoma
- lymphomatosis
- lymphopenia
- lymphopoiesis
- lymphosarcoma
- lymphotoxin
- lymphotrophic
- Lynagh
- Lynbrook
- lyncean
- lynch
- Lynch
- Lynchburg
- lynchet
- lynch law
- lynch mob
- lynchpin
- Lynd
- Lynda
- Lyndhurst
- Lyndon
- Lyndora
- Lyndsay
- Lynen
- Lynette
- Lyngvi
- Lynn
- Lynn Canal
- Lynnfield
- Lynnwood
- Lynwood
- lynx
- Lynx
- lynx-eyed
- lyo-
- lyocratic
- lyolysis
- Lyon
- Lyon bean
- Lyon King of Arms
- Lyonnais
- lyonnaise
- Lyonnesse
- Lyon Office of Arms
- Lyons
- lyophilic
- lyophilize
- lyophobic
- lyosorption
- lyotropic
- Lyra
- lyrate
- lyra viol
- lyre
- lyre back
- lyrebird
- lyre-form sofa
- lyre snake
- lyric
- lyrical
- lyricism
- lyricist
- lyricize
- Lyrids
- lyriform
- lyrism
- lyrist
- Lys
- lys-
- Lysander
- Lysandra
- lysate
- lyse
- Lysenko
- Lysenkoism
- lysergic acid
- lysergic acid diethylamide
- lysi-
- Lysias
- Lysimachus
- lysimeter
- lysin
- lysine
- Lysippus
- lysis
- Lysistrata
- Lysithea
- lyso-
- lysocline
- lysogen
- lysogenesis
- lysogenic
- lysogenize
- lysogeny
- Lysol
- lysosome
- lysozyme
- lyssa
- lyssophobia
- Lysychansk
- Lytham Saint Anne's
- lythraceous
- lytic
- lytta
- Lyttelton
- Lytton
- Lyubertsy
- Lyublin
- LZ
