- Lie-abed
- Life-jacket
- Lackadaisically
- Lactic
- Lop-eared
- Lacustrine
- Lopping
- Ladies
- Lady-in-waiting
- Loudmouth
- Love-match
- Laid-back
- Love-token
- Love-song
- Lifting
- Love-philtre
- Low-down
- Low-lying
- Low-toned
- Low-spirited
- Lulling
- Lunch-hour
- Lung-power
- Lungs
- Labials
- Lactifuge
- Landings
- Landmine
- Lanugo
- Larvae
- Laryngismus
- Layering
- Leeching
- Lefthandedness
- Legend,
- Legumes
- Ligaments
- Littering
- Lobes
- Locum
- Logarithmic
- Loggia
- Loligo
- Logoff
- Looming
- Lorica
- Low pressure
- Lubricants
- Lumps
- Lunisolar