- Light-year
- Large-hearted
- Large-scale
- Largest
- Likened
- Laryngeal
- Lily-white
- Liliaceous
- Lash-up
- Latish
- Lime-green
- Latitudinal
- Lauded
- Laughed
- Line-up
- Laughing-gas
- Lay-up
- Lists
- Lead-in
- Lean-to
- Leaf-miner
- Leapt
- Leave-taking
- Left-hand
- Left-winger
- Living-room
- Load-shedding
- Loafers
- Lobbying
- Locals
- Locum tenens
- Log-jam
- Lollop
- Lenten
- Longed
- Long-headed
- Long-suffering
- Long-lived
- Long-legged
- Long-range
- Long-standing
- Long-time
- Level-headed
- Loony-bin
- Liberating
- Loose-fitting
- Labour-saving
- Licked
- Lace-up
- Life-sized