- lutefisk
- lutein
- luteinize
- luteinizing hormone
- luteinizing hormone-releasing hormone
- lutenist
- luteo-
- luteolin
- luteotrophin
- luteotropic
- luteous
- lutestring
- lutetium
- luthern
- luthier
- luting
- lutist
- lutite
- lutose
- lutz
- luv
- luvvie
- lux
- luxate
- luxe
- luxulianite
- luxuriance
- luxuriant
- luxuriate
- luxurious
- luxury
- luxury tax
- lv
- lv.
- lwei
- lwl
- lwop
- lwp
- lx
- ly
- lyam-hound
- lyard
- lyase
- lycanthrope
- lycanthropy
- lyceum
- lych gate
- lychee
- lychnis
- lychnoscope
- lycine
- lycopene
- lycophyte
- lycopod
- lycopodium
- lycoris
- lycosid
- lycée
- lyddite
- lye
- lye hominy
- lyefish
- lygaeid
- lying
- lying down
- lying-in
- lyke-wake
- lyme grass
- lyme-hound
- lymph
- lymph cell
- lymph gland
- lymph node
- lymph nodes
- lymph-
- lymphadenectomy
- lymphadenitis
- lymphadenoma
- lymphadenopathy
- lymphadenopathy-associated virus
- lymphangi-
- lymphangial
- lymphangiography
- lymphangioma
- lymphangitis
- lymphatic
- lymphatic system
- lymphatic tissue
- lymphatolysis
- lymphedema
- 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
- lyncean
- lynch
- lynch law
- lynch mob
- lynchet
- lynchpin
- lynx
- lynx-eyed
- lyo-
- lyocratic
- lyolysis
- lyonnaise
- lyophilic
- lyophilize
- lyophobic
- lyosorption
- lyotropic
- lyra viol
- lyrate
- lyre
- lyre back
- lyre snake
- lyre-form sofa
- lyrebird
- lyric
- lyrical
- lyricism
- lyricist
- lyricize
- lyriform
- lyrism
- lyrist
- lys-
- lysate
- lyse
- lysergic acid
- lysergic acid diethylamide
- lysi-
- lysimeter
- lysin
- lysine
- lysis
- lyso-
- lysocline
- lysogen
- lysogenesis
- lysogenic
- lysogenize
- lysogeny
- lysosome
- lysozyme
- lyssa
- lyssophobia
- lythraceous
- lytic
- lytta
- lât
- ländler
- löllingite
- lām